1.
Reint Dallinga Nicolas Carette, Geert Kapsenberg
On the design of anti-roll tanks Conference
13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark, 2016.
@conference{Carette2016b,
title = {On the design of anti-roll tanks},
author = {Nicolas Carette, Reint Dallinga, Geert Kapsenberg},
url = {http://www.marin.nl/web/Publications/Papers/On-the-design-of-antiroll-tanks.htm},
year = {2016},
date = {2016-09-04},
booktitle = {13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark},
pages = {ID030},
abstract = {Traditionally, the procedure to design anti-roll tanks is limited to the assessment of the reaction moment due to a regular roll motion. Although this procedure may seem adequate for a badly rolling ship, the neglect of the sway motion is by no means trivial for a well stabilized ship, which is the very purpose of the stabilizing tank. Moreover, older literature and previous studies showed that the response of the tank is non-linearly dependent on the amplitude and frequency of this complex excitation. The present work summarizes how the complex performance of the tank can be understood and what the consequences of this understanding are for the use of frequency domain methods to predict the motion response of a stabilized ship.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Traditionally, the procedure to design anti-roll tanks is limited to the assessment of the reaction moment due to a regular roll motion. Although this procedure may seem adequate for a badly rolling ship, the neglect of the sway motion is by no means trivial for a well stabilized ship, which is the very purpose of the stabilizing tank. Moreover, older literature and previous studies showed that the response of the tank is non-linearly dependent on the amplitude and frequency of this complex excitation. The present work summarizes how the complex performance of the tank can be understood and what the consequences of this understanding are for the use of frequency domain methods to predict the motion response of a stabilized ship.
2.
Sergio Fernandez Ruano Rob Grin, Nick Bradbeer; Koelman, Herbert
On the prediction of weight distribution and its effect on seakeeping Conference
13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark, 2016.
@conference{Grin2016,
title = {On the prediction of weight distribution and its effect on seakeeping},
author = {Rob Grin, Sergio Fernandez Ruano, Nick Bradbeer and Herbert Koelman},
url = {http://www.marin.nl/web/Publications/Papers/On-the-prediction-of-weight-distribution-and-its-effect-on-seakeeping.htm},
year = {2016},
date = {2016-09-04},
booktitle = {13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark},
pages = {ID054},
abstract = {During the design of any ship it is normal to assess its seakeeping behavior. Whether numerical or experimental methods are used, they require accurate knowledge of the ship’s radii of inertia, usually only calculable in the latter stages of design. Various estimation methods are available to predict the radii of gyration earlier in the design process, but this paper shows that they frequently fail to predict the correct value. A semi-empirical estimation method, suitable for use in the early stages of design, has been proposed in earlier work by the authors and was found to give good predictions of the eventual radii of inertia. This paper expands the range of ships against which this method was validated from five to nine (and sixteen total conditions). The method continues to provide good predictions of the radii of inertia over this in-creased range of ships, and remains suitable for use during the basic design stage.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
During the design of any ship it is normal to assess its seakeeping behavior. Whether numerical or experimental methods are used, they require accurate knowledge of the ship’s radii of inertia, usually only calculable in the latter stages of design. Various estimation methods are available to predict the radii of gyration earlier in the design process, but this paper shows that they frequently fail to predict the correct value. A semi-empirical estimation method, suitable for use in the early stages of design, has been proposed in earlier work by the authors and was found to give good predictions of the eventual radii of inertia. This paper expands the range of ships against which this method was validated from five to nine (and sixteen total conditions). The method continues to provide good predictions of the radii of inertia over this in-creased range of ships, and remains suitable for use during the basic design stage.
3.
Carette, Nicolas F. A. J.
15th International Ship Stability Workshop, Stockholm, Sweden, 2016.
@conference{Carette2016,
title = {Fast time domain evaluation of Anti-Roll Tank and ship coupling using non-linear retardation functions},
author = {Nicolas F.A.J. Carette},
url = {http://www.marin.nl/web/Publications/Papers/Fast-time-domain-evaluation-of-AntiRoll-Tank-and-ship-coupling-using-nonlinear-retardation-functions-1.htm},
year = {2016},
date = {2016-06-13},
booktitle = {15th International Ship Stability Workshop, Stockholm, Sweden},
pages = {2_2},
abstract = {Anti-Roll Tanks (ART) have been used for more than a century to damp the roll motion of ships. These devices exist in various configurations, passively and actively controlled. All versions rely on resonant water motions in a chamber which, by essence, is a very non-linear process. To account for these non-linearities, several approaches have been proposed, where the most recent and complete one is the direct coupling of time domain seakeeping codes with a CFD models of the ART. However, this approach comes at the price of relatively high computation effort. This is in contradiction with the need for long simulations to establish the effects of the non-linearities in the ART reaction forces on extreme events. To reduce the computation costs of a direct simulation, a new technique is proposed which uses retardation functions based on harmonic ART response data. The technique proposed here uses a family of retardation functions with a Hilbert transform method for time dependent interpolations to capture the non-linearity in the response of the tank as a function of excitation amplitude.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Anti-Roll Tanks (ART) have been used for more than a century to damp the roll motion of ships. These devices exist in various configurations, passively and actively controlled. All versions rely on resonant water motions in a chamber which, by essence, is a very non-linear process. To account for these non-linearities, several approaches have been proposed, where the most recent and complete one is the direct coupling of time domain seakeeping codes with a CFD models of the ART. However, this approach comes at the price of relatively high computation effort. This is in contradiction with the need for long simulations to establish the effects of the non-linearities in the ART reaction forces on extreme events. To reduce the computation costs of a direct simulation, a new technique is proposed which uses retardation functions based on harmonic ART response data. The technique proposed here uses a family of retardation functions with a Hilbert transform method for time dependent interpolations to capture the non-linearity in the response of the tank as a function of excitation amplitude.
4.
Grin, Rob
On the Prediction of Wave-added Resistance with Empirical Method Journal Article
In: Journal of Ship Production and Design, vol. 30, no. 4, pp. 11, 2014.
@article{Grin2014,
title = {On the Prediction of Wave-added Resistance with Empirical Method},
author = {Rob Grin},
url = {http://www.marin.nl/web/Publications/Publication-items/On-the-Prediction-of-Waveadded-Resistance-with-Empirical-Methods.htm},
year = {2014},
date = {2014-11-01},
journal = {Journal of Ship Production and Design},
volume = {30},
number = {4},
pages = {11},
abstract = {The prediction of wave-added resistance is important for several reasons. In heavy weather safety aspects are most important.
Is the ship able to sustain sufficient speed to maintain heading and is the main engine able to cope with the overload? In moderate weather conditions, fuel economy is most important. In these conditions, the power demand increases when speed is sustained or when sailing at constant power the added resistance will result in speed loss.
The safety and economic aspects can already be studied in the design stage with so-called operability studies. These studies account for the actual service conditions and assist the designer to optimize for service conditions and to select an appropriate service margin. When the service margin is too low, safety might be at risk and the reliability in terms of arrival times will be low. When the service margin is too high, the main engine will run most of the time at inefficient power settings and (future) energy efficiency design index (EEDI) requirements might not be met.
Within the present work we compared two recently developed empirical prediction methods, two established empirical methods developed in the 1970s and experimental data in regular waves and irregular seas. The first new method (STAWAVE2) predicts added resistance in head seas only and has been developed within the Sea Trial Performance Joint Industry Project (STA-JIP). The goal of this JIP was to improve transparency and accuracy of speed trials. One of the requirements was to deliver a reliable correction method for wave-added resistance. The second new method (SPAWAVE) is suitable for all wave directions and has been developed within the service performance analysis joint industry project (SPA-JIP). This JIP aimed at the reduction of fuel consumption by careful analysis of the vessel performance in service conditions.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The prediction of wave-added resistance is important for several reasons. In heavy weather safety aspects are most important.
Is the ship able to sustain sufficient speed to maintain heading and is the main engine able to cope with the overload? In moderate weather conditions, fuel economy is most important. In these conditions, the power demand increases when speed is sustained or when sailing at constant power the added resistance will result in speed loss.
The safety and economic aspects can already be studied in the design stage with so-called operability studies. These studies account for the actual service conditions and assist the designer to optimize for service conditions and to select an appropriate service margin. When the service margin is too low, safety might be at risk and the reliability in terms of arrival times will be low. When the service margin is too high, the main engine will run most of the time at inefficient power settings and (future) energy efficiency design index (EEDI) requirements might not be met.
Within the present work we compared two recently developed empirical prediction methods, two established empirical methods developed in the 1970s and experimental data in regular waves and irregular seas. The first new method (STAWAVE2) predicts added resistance in head seas only and has been developed within the Sea Trial Performance Joint Industry Project (STA-JIP). The goal of this JIP was to improve transparency and accuracy of speed trials. One of the requirements was to deliver a reliable correction method for wave-added resistance. The second new method (SPAWAVE) is suitable for all wave directions and has been developed within the service performance analysis joint industry project (SPA-JIP). This JIP aimed at the reduction of fuel consumption by careful analysis of the vessel performance in service conditions.
Is the ship able to sustain sufficient speed to maintain heading and is the main engine able to cope with the overload? In moderate weather conditions, fuel economy is most important. In these conditions, the power demand increases when speed is sustained or when sailing at constant power the added resistance will result in speed loss.
The safety and economic aspects can already be studied in the design stage with so-called operability studies. These studies account for the actual service conditions and assist the designer to optimize for service conditions and to select an appropriate service margin. When the service margin is too low, safety might be at risk and the reliability in terms of arrival times will be low. When the service margin is too high, the main engine will run most of the time at inefficient power settings and (future) energy efficiency design index (EEDI) requirements might not be met.
Within the present work we compared two recently developed empirical prediction methods, two established empirical methods developed in the 1970s and experimental data in regular waves and irregular seas. The first new method (STAWAVE2) predicts added resistance in head seas only and has been developed within the Sea Trial Performance Joint Industry Project (STA-JIP). The goal of this JIP was to improve transparency and accuracy of speed trials. One of the requirements was to deliver a reliable correction method for wave-added resistance. The second new method (SPAWAVE) is suitable for all wave directions and has been developed within the service performance analysis joint industry project (SPA-JIP). This JIP aimed at the reduction of fuel consumption by careful analysis of the vessel performance in service conditions.
5.
Abeil, Bastien
Largest containership in the world ‘Triple-E’ first tested at MARIN! Journal Article
In: MARIN Report, no. 112, pp. 22-23, 2014.
@article{Abeil2014,
title = {Largest containership in the world ‘Triple-E’ first tested at MARIN!},
author = {Bastien Abeil},
url = {http://www.marin.nl/extra/marin-bladermodules/html/112/#22},
year = {2014},
date = {2014-08-01},
journal = {MARIN Report},
number = {112},
pages = {22-23},
abstract = {MARIN was delighted to take part in a truly historic milestone in the industry when Daewoo Shipbuilding and Marine Engineering (DSME) asked MARIN to investigate the seakeeping ability of what would become the largest container vessel in the world - Maersk Line’s Triple-E.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
MARIN was delighted to take part in a truly historic milestone in the industry when Daewoo Shipbuilding and Marine Engineering (DSME) asked MARIN to investigate the seakeeping ability of what would become the largest container vessel in the world - Maersk Line’s Triple-E.
6.
Hooijmans, Patrick; van der Meij, Karola; Greening, David; Yu, Lai
Traditions broken in modern container ship design Conference
Design & Operation of Container Ships, 21-22 May 2014, London, UK, The Royal Institute of Naval Architects, 2014.
@conference{Hooijmans2014,
title = {Traditions broken in modern container ship design},
author = {Patrick Hooijmans and Karola van der Meij and David Greening and Lai Yu},
url = {http://test.sssri-marin.com/wp-content/uploads/2016/01/Paper-Traditions-broken-in-modern-container-ship-design.pdf
http://www.rina.org.uk/Containership2014.html},
year = {2014},
date = {2014-05-21},
booktitle = {Design & Operation of Container Ships, 21-22 May 2014, London, UK},
publisher = {The Royal Institute of Naval Architects},
abstract = {The design of a say 5 year ‘young’ container ship is usually the result of an optimisation for maximum speed at design draught. Such design is mostly the result of an attempt to reach the contractual speed. However, a well balanced modern container ship should be a compromise between minimum fuel consumption and maximum cargo capacity across an intended or forecasted operational profile. In the design process, the focus should not only be on the calm water resistance and propulsive aspects but also the added resistance due to wind and waves should be considered, as well as the cavitation behaviour and related propeller induced pressure pulses. The SAVER 10000 developed for and in cooperation with the Canadian Owner Seaspan Ship Management Limited (Seaspan) is a pioneer in this new approach to balance the minimum fuel consumption and maximum loadability, taking into account the aspects as indicated.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The design of a say 5 year ‘young’ container ship is usually the result of an optimisation for maximum speed at design draught. Such design is mostly the result of an attempt to reach the contractual speed. However, a well balanced modern container ship should be a compromise between minimum fuel consumption and maximum cargo capacity across an intended or forecasted operational profile. In the design process, the focus should not only be on the calm water resistance and propulsive aspects but also the added resistance due to wind and waves should be considered, as well as the cavitation behaviour and related propeller induced pressure pulses. The SAVER 10000 developed for and in cooperation with the Canadian Owner Seaspan Ship Management Limited (Seaspan) is a pioneer in this new approach to balance the minimum fuel consumption and maximum loadability, taking into account the aspects as indicated.
7.
Jaap van Heerd Rob Grin, Victor Ferrari
Hydrodynamic Aspects in the Design of Passenger Vessels Conference
International Conference on Design & Operation of Passenger Ships, London, UK, The Royal Institution of Naval Architects 2013.
@conference{Grin2013,
title = {Hydrodynamic Aspects in the Design of Passenger Vessels},
author = {Rob Grin, Jaap van Heerd, Victor Ferrari},
year = {2013},
date = {2013-11-20},
booktitle = {International Conference on Design & Operation of Passenger Ships, London, UK},
organization = {The Royal Institution of Naval Architects},
abstract = {The present paper discusses in detail the principal hydrodynamic aspects that challenge the design of passenger vessels. This type of ship must not only have good efficiency and operability for keeping tight time schedules, but must also provide comfort and ensure safety to the passengers. To achieve a proper balance between these different aspects the designer must face and solve particular issues, distinctive of this kind of vessel. Recent hydrodynamic studies performed at MARIN, both numerical and experimental, have provided information on this topic and are presented in this paper.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The present paper discusses in detail the principal hydrodynamic aspects that challenge the design of passenger vessels. This type of ship must not only have good efficiency and operability for keeping tight time schedules, but must also provide comfort and ensure safety to the passengers. To achieve a proper balance between these different aspects the designer must face and solve particular issues, distinctive of this kind of vessel. Recent hydrodynamic studies performed at MARIN, both numerical and experimental, have provided information on this topic and are presented in this paper.
8.
Grin, Rob
On The Prediction Of Wave Added Resistance Conference
11th International Marine Design Conference (IMDC), Glasgow, UK, 2012.
@conference{Grin2012,
title = {On The Prediction Of Wave Added Resistance},
author = {Rob Grin},
url = {http://www.marin.nl/web/News/News-items/On-The-Prediction-Of-Wave-Added-Resistance.htm
},
year = {2012},
date = {2012-06-11},
booktitle = {11th International Marine Design Conference (IMDC), Glasgow, UK},
abstract = {There is continuous research on analytical, numerical and (semi-)empirical methods to predict wave added resistance. Most of this research focuses on a particular area, like motion induced wave added resistance, wave added resistance in short waves or is limited to head seas only. The practical application of most methods is therefore often limited. Moreover, most methods require detailed information on hull lines and results are rather sensitive to the discretisation of those hull lines. Since 2006, MARIN has been investigating the feasibility of empirical methods which do not have those limitations. They only require the main particulars to predict wave added resistance. Within the Sea Trial Analysis joint industry project (STA-JIP), a method was developed for the correction of wave added resistance in head seas covering both the motion induced and the wave reflection induced component. This method was further refined and extended to all wave directions within the service performance analysis JIP (SPA-JIP) in 2008.
This paper presents the results of the comparison between the prediction methods and model tests for almost 50 different ships, comprising more than 1500 tests in regular and irregular seas.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
There is continuous research on analytical, numerical and (semi-)empirical methods to predict wave added resistance. Most of this research focuses on a particular area, like motion induced wave added resistance, wave added resistance in short waves or is limited to head seas only. The practical application of most methods is therefore often limited. Moreover, most methods require detailed information on hull lines and results are rather sensitive to the discretisation of those hull lines. Since 2006, MARIN has been investigating the feasibility of empirical methods which do not have those limitations. They only require the main particulars to predict wave added resistance. Within the Sea Trial Analysis joint industry project (STA-JIP), a method was developed for the correction of wave added resistance in head seas covering both the motion induced and the wave reflection induced component. This method was further refined and extended to all wave directions within the service performance analysis JIP (SPA-JIP) in 2008.
This paper presents the results of the comparison between the prediction methods and model tests for almost 50 different ships, comprising more than 1500 tests in regular and irregular seas.
This paper presents the results of the comparison between the prediction methods and model tests for almost 50 different ships, comprising more than 1500 tests in regular and irregular seas.
9.
Dallinga, Reint
Prediction of added resistance of ships in waves under further scrutiny Journal Article
In: MARIN Report, no. 104, pp. 12-13, 2011.
@article{Dallinga2011,
title = {Prediction of added resistance of ships in waves under further scrutiny},
author = {Reint Dallinga},
url = {http://www.marin.nl/web/Publications/Publication-items/Prediction-of-added-resistance-of-ships-in-waves-under-further-scrutiny.htm},
year = {2011},
date = {2011-12-01},
journal = {MARIN Report},
number = {104},
pages = {12-13},
institution = {MARIN },
abstract = {MARIN investigates the merits of a Rankine source method in the prediction of added resistance.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
MARIN investigates the merits of a Rankine source method in the prediction of added resistance.
10.
Reint Dallinga, J E Bos
Cruise ship seakeeping and passenger comfort Conference
International Conference On Human Performance at Sea, Glasgow, Scotland, United Kingdom, HPAS 2010.
@conference{Dallinga2010,
title = {Cruise ship seakeeping and passenger comfort},
author = {Reint Dallinga, J E Bos},
url = {http://www.marin.nl/web/Publications/Publication-items/Cruise-ship-seakeeping-and-passenger-comfort.htm},
year = {2010},
date = {2010-06-16},
booktitle = {International Conference On Human Performance at Sea, Glasgow, Scotland, United Kingdom},
organization = {HPAS},
abstract = {In the last decade the design and construction of a substantial volume of large cruise ships has stimulated the evolution of cruise ship design. The MARIN and TNO involvement in these developments, and in particular the increase in size, have lead to new insights in how the ship design governs passenger discomfort.
Our contribution to the conference highlights our experience with the link between passenger comfort and cruise ship design by identifying the particular seakeeping qualities of cruise ships that govern passenger comfort and showing the impact the most important choices in cruise ship design on these governing factors. Attention is paid to the effect of combined motions and roll stabilisation on seasickness, the discomfort introduced by slamming induced whipping and to postural stability.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
In the last decade the design and construction of a substantial volume of large cruise ships has stimulated the evolution of cruise ship design. The MARIN and TNO involvement in these developments, and in particular the increase in size, have lead to new insights in how the ship design governs passenger discomfort.
Our contribution to the conference highlights our experience with the link between passenger comfort and cruise ship design by identifying the particular seakeeping qualities of cruise ships that govern passenger comfort and showing the impact the most important choices in cruise ship design on these governing factors. Attention is paid to the effect of combined motions and roll stabilisation on seasickness, the discomfort introduced by slamming induced whipping and to postural stability.
Our contribution to the conference highlights our experience with the link between passenger comfort and cruise ship design by identifying the particular seakeeping qualities of cruise ships that govern passenger comfort and showing the impact the most important choices in cruise ship design on these governing factors. Attention is paid to the effect of combined motions and roll stabilisation on seasickness, the discomfort introduced by slamming induced whipping and to postural stability.
11.
Dallinga, Reint; van Walree, Frans; Grin, Rob; Koning, Jos
Seakeeping issues in the design of containerships Conference
Design & Operation of Container Ships 2008, The Royal Institute of Naval Architects 2008.
@conference{Dallinga2008,
title = {Seakeeping issues in the design of containerships},
author = {Reint Dallinga and Frans van Walree and Rob Grin and Jos Koning},
url = {http://www.marin.nl/web/Publications/Papers/Seakeeping-issues-in-the-design-of-containerships.htm
http://www.rina.org.uk/search_publications.html},
year = {2008},
date = {2008-01-01},
booktitle = {Design & Operation of Container Ships 2008},
organization = {The Royal Institute of Naval Architects},
abstract = {While the advanced art of minimising the installed power for a given speed has a clear role in the design of container ships, the place of seakeeping is less well established. The incidental character of seakeeping problems at sea in combination with the fact that building for good seakeeping may decrease the container capacity and increase the building costs seems a major reason for this, in addition to the sheer complexity of the issues. The present paper
addresses the last point with an effort to give a complete review of the seakeeping issues in containership design. Based on recent experience from model tests the work explores the physical nature of the involuntary speed loss in waves and reasons for a voluntary speed reduction (green water loads, whipping accelerations due to bow and stern slamming, engine racing) or change in course (exposure of containers to wave crests, rolling). In addition a review is given of the extreme behaviour that the master would like to avoid altogether, like excessive heel due to loss of stability in following seas and parametric roll. Based on the results tentative design guidance is formulated.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
While the advanced art of minimising the installed power for a given speed has a clear role in the design of container ships, the place of seakeeping is less well established. The incidental character of seakeeping problems at sea in combination with the fact that building for good seakeeping may decrease the container capacity and increase the building costs seems a major reason for this, in addition to the sheer complexity of the issues. The present paper
addresses the last point with an effort to give a complete review of the seakeeping issues in containership design. Based on recent experience from model tests the work explores the physical nature of the involuntary speed loss in waves and reasons for a voluntary speed reduction (green water loads, whipping accelerations due to bow and stern slamming, engine racing) or change in course (exposure of containers to wave crests, rolling). In addition a review is given of the extreme behaviour that the master would like to avoid altogether, like excessive heel due to loss of stability in following seas and parametric roll. Based on the results tentative design guidance is formulated.
addresses the last point with an effort to give a complete review of the seakeeping issues in containership design. Based on recent experience from model tests the work explores the physical nature of the involuntary speed loss in waves and reasons for a voluntary speed reduction (green water loads, whipping accelerations due to bow and stern slamming, engine racing) or change in course (exposure of containers to wave crests, rolling). In addition a review is given of the extreme behaviour that the master would like to avoid altogether, like excessive heel due to loss of stability in following seas and parametric roll. Based on the results tentative design guidance is formulated.
12.
van Heerd, Jaap
Five decades of innovation and a great future Journal Article
In: MARIN Report, no. 90, pp. 10, 2007.
@article{vanHeerd2007,
title = {Five decades of innovation and a great future},
author = {Jaap van Heerd},
url = {http://www.marin.nl/web/Publications/MARIN-Report/All-issues/MARIN-Report-2007/Five-decades-of-innovation-and-a-great-future.htm},
year = {2007},
date = {2007-02-01},
journal = {MARIN Report},
number = {90},
pages = {10},
abstract = {MARIN started the first investigations into passenger vessels around 1950. During the last decades the size of the vessels, the available power and the requested service speeds have increased dramatically. This requires innovative hull form designs and extensive numerical and experimental research. Report takes a look at some of the highlights of the last 50 years.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
MARIN started the first investigations into passenger vessels around 1950. During the last decades the size of the vessels, the available power and the requested service speeds have increased dramatically. This requires innovative hull form designs and extensive numerical and experimental research. Report takes a look at some of the highlights of the last 50 years.
2016
Reint Dallinga Nicolas Carette, Geert Kapsenberg
On the design of anti-roll tanks Conference
13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark, 2016.
Abstract | Links | BibTeX | Tags: anti-roll tank, design, operability, seakeeping
@conference{Carette2016b,
title = {On the design of anti-roll tanks},
author = {Nicolas Carette, Reint Dallinga, Geert Kapsenberg},
url = {http://www.marin.nl/web/Publications/Papers/On-the-design-of-antiroll-tanks.htm},
year = {2016},
date = {2016-09-04},
booktitle = {13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark},
pages = {ID030},
abstract = {Traditionally, the procedure to design anti-roll tanks is limited to the assessment of the reaction moment due to a regular roll motion. Although this procedure may seem adequate for a badly rolling ship, the neglect of the sway motion is by no means trivial for a well stabilized ship, which is the very purpose of the stabilizing tank. Moreover, older literature and previous studies showed that the response of the tank is non-linearly dependent on the amplitude and frequency of this complex excitation. The present work summarizes how the complex performance of the tank can be understood and what the consequences of this understanding are for the use of frequency domain methods to predict the motion response of a stabilized ship.},
keywords = {anti-roll tank, design, operability, seakeeping},
pubstate = {published},
tppubtype = {conference}
}
Traditionally, the procedure to design anti-roll tanks is limited to the assessment of the reaction moment due to a regular roll motion. Although this procedure may seem adequate for a badly rolling ship, the neglect of the sway motion is by no means trivial for a well stabilized ship, which is the very purpose of the stabilizing tank. Moreover, older literature and previous studies showed that the response of the tank is non-linearly dependent on the amplitude and frequency of this complex excitation. The present work summarizes how the complex performance of the tank can be understood and what the consequences of this understanding are for the use of frequency domain methods to predict the motion response of a stabilized ship.
Sergio Fernandez Ruano Rob Grin, Nick Bradbeer; Koelman, Herbert
On the prediction of weight distribution and its effect on seakeeping Conference
13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark, 2016.
Abstract | Links | BibTeX | Tags: Prediction method, Radii of inertia, seakeeping, Ship motions, Weight distribution
@conference{Grin2016,
title = {On the prediction of weight distribution and its effect on seakeeping},
author = {Rob Grin, Sergio Fernandez Ruano, Nick Bradbeer and Herbert Koelman},
url = {http://www.marin.nl/web/Publications/Papers/On-the-prediction-of-weight-distribution-and-its-effect-on-seakeeping.htm},
year = {2016},
date = {2016-09-04},
booktitle = {13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark},
pages = {ID054},
abstract = {During the design of any ship it is normal to assess its seakeeping behavior. Whether numerical or experimental methods are used, they require accurate knowledge of the ship’s radii of inertia, usually only calculable in the latter stages of design. Various estimation methods are available to predict the radii of gyration earlier in the design process, but this paper shows that they frequently fail to predict the correct value. A semi-empirical estimation method, suitable for use in the early stages of design, has been proposed in earlier work by the authors and was found to give good predictions of the eventual radii of inertia. This paper expands the range of ships against which this method was validated from five to nine (and sixteen total conditions). The method continues to provide good predictions of the radii of inertia over this in-creased range of ships, and remains suitable for use during the basic design stage.},
keywords = {Prediction method, Radii of inertia, seakeeping, Ship motions, Weight distribution},
pubstate = {published},
tppubtype = {conference}
}
During the design of any ship it is normal to assess its seakeeping behavior. Whether numerical or experimental methods are used, they require accurate knowledge of the ship’s radii of inertia, usually only calculable in the latter stages of design. Various estimation methods are available to predict the radii of gyration earlier in the design process, but this paper shows that they frequently fail to predict the correct value. A semi-empirical estimation method, suitable for use in the early stages of design, has been proposed in earlier work by the authors and was found to give good predictions of the eventual radii of inertia. This paper expands the range of ships against which this method was validated from five to nine (and sixteen total conditions). The method continues to provide good predictions of the radii of inertia over this in-creased range of ships, and remains suitable for use during the basic design stage.
Carette, Nicolas F. A. J.
15th International Ship Stability Workshop, Stockholm, Sweden, 2016.
Abstract | Links | BibTeX | Tags: anti-roll tank, free surface tank, seakeeping, Time domain, U-tank
@conference{Carette2016,
title = {Fast time domain evaluation of Anti-Roll Tank and ship coupling using non-linear retardation functions},
author = {Nicolas F.A.J. Carette},
url = {http://www.marin.nl/web/Publications/Papers/Fast-time-domain-evaluation-of-AntiRoll-Tank-and-ship-coupling-using-nonlinear-retardation-functions-1.htm},
year = {2016},
date = {2016-06-13},
booktitle = {15th International Ship Stability Workshop, Stockholm, Sweden},
pages = {2_2},
abstract = {Anti-Roll Tanks (ART) have been used for more than a century to damp the roll motion of ships. These devices exist in various configurations, passively and actively controlled. All versions rely on resonant water motions in a chamber which, by essence, is a very non-linear process. To account for these non-linearities, several approaches have been proposed, where the most recent and complete one is the direct coupling of time domain seakeeping codes with a CFD models of the ART. However, this approach comes at the price of relatively high computation effort. This is in contradiction with the need for long simulations to establish the effects of the non-linearities in the ART reaction forces on extreme events. To reduce the computation costs of a direct simulation, a new technique is proposed which uses retardation functions based on harmonic ART response data. The technique proposed here uses a family of retardation functions with a Hilbert transform method for time dependent interpolations to capture the non-linearity in the response of the tank as a function of excitation amplitude.},
keywords = {anti-roll tank, free surface tank, seakeeping, Time domain, U-tank},
pubstate = {published},
tppubtype = {conference}
}
Anti-Roll Tanks (ART) have been used for more than a century to damp the roll motion of ships. These devices exist in various configurations, passively and actively controlled. All versions rely on resonant water motions in a chamber which, by essence, is a very non-linear process. To account for these non-linearities, several approaches have been proposed, where the most recent and complete one is the direct coupling of time domain seakeeping codes with a CFD models of the ART. However, this approach comes at the price of relatively high computation effort. This is in contradiction with the need for long simulations to establish the effects of the non-linearities in the ART reaction forces on extreme events. To reduce the computation costs of a direct simulation, a new technique is proposed which uses retardation functions based on harmonic ART response data. The technique proposed here uses a family of retardation functions with a Hilbert transform method for time dependent interpolations to capture the non-linearity in the response of the tank as a function of excitation amplitude.
2014
Grin, Rob
On the Prediction of Wave-added Resistance with Empirical Method Journal Article
In: Journal of Ship Production and Design, vol. 30, no. 4, pp. 11, 2014.
Abstract | Links | BibTeX | Tags: added resistance in waves, sea margin, sea trial, seakeeping, speed loss, STA JIP
@article{Grin2014,
title = {On the Prediction of Wave-added Resistance with Empirical Method},
author = {Rob Grin},
url = {http://www.marin.nl/web/Publications/Publication-items/On-the-Prediction-of-Waveadded-Resistance-with-Empirical-Methods.htm},
year = {2014},
date = {2014-11-01},
journal = {Journal of Ship Production and Design},
volume = {30},
number = {4},
pages = {11},
abstract = {The prediction of wave-added resistance is important for several reasons. In heavy weather safety aspects are most important.
Is the ship able to sustain sufficient speed to maintain heading and is the main engine able to cope with the overload? In moderate weather conditions, fuel economy is most important. In these conditions, the power demand increases when speed is sustained or when sailing at constant power the added resistance will result in speed loss.
The safety and economic aspects can already be studied in the design stage with so-called operability studies. These studies account for the actual service conditions and assist the designer to optimize for service conditions and to select an appropriate service margin. When the service margin is too low, safety might be at risk and the reliability in terms of arrival times will be low. When the service margin is too high, the main engine will run most of the time at inefficient power settings and (future) energy efficiency design index (EEDI) requirements might not be met.
Within the present work we compared two recently developed empirical prediction methods, two established empirical methods developed in the 1970s and experimental data in regular waves and irregular seas. The first new method (STAWAVE2) predicts added resistance in head seas only and has been developed within the Sea Trial Performance Joint Industry Project (STA-JIP). The goal of this JIP was to improve transparency and accuracy of speed trials. One of the requirements was to deliver a reliable correction method for wave-added resistance. The second new method (SPAWAVE) is suitable for all wave directions and has been developed within the service performance analysis joint industry project (SPA-JIP). This JIP aimed at the reduction of fuel consumption by careful analysis of the vessel performance in service conditions.},
keywords = {added resistance in waves, sea margin, sea trial, seakeeping, speed loss, STA JIP},
pubstate = {published},
tppubtype = {article}
}
The prediction of wave-added resistance is important for several reasons. In heavy weather safety aspects are most important.
Is the ship able to sustain sufficient speed to maintain heading and is the main engine able to cope with the overload? In moderate weather conditions, fuel economy is most important. In these conditions, the power demand increases when speed is sustained or when sailing at constant power the added resistance will result in speed loss.
The safety and economic aspects can already be studied in the design stage with so-called operability studies. These studies account for the actual service conditions and assist the designer to optimize for service conditions and to select an appropriate service margin. When the service margin is too low, safety might be at risk and the reliability in terms of arrival times will be low. When the service margin is too high, the main engine will run most of the time at inefficient power settings and (future) energy efficiency design index (EEDI) requirements might not be met.
Within the present work we compared two recently developed empirical prediction methods, two established empirical methods developed in the 1970s and experimental data in regular waves and irregular seas. The first new method (STAWAVE2) predicts added resistance in head seas only and has been developed within the Sea Trial Performance Joint Industry Project (STA-JIP). The goal of this JIP was to improve transparency and accuracy of speed trials. One of the requirements was to deliver a reliable correction method for wave-added resistance. The second new method (SPAWAVE) is suitable for all wave directions and has been developed within the service performance analysis joint industry project (SPA-JIP). This JIP aimed at the reduction of fuel consumption by careful analysis of the vessel performance in service conditions.
Is the ship able to sustain sufficient speed to maintain heading and is the main engine able to cope with the overload? In moderate weather conditions, fuel economy is most important. In these conditions, the power demand increases when speed is sustained or when sailing at constant power the added resistance will result in speed loss.
The safety and economic aspects can already be studied in the design stage with so-called operability studies. These studies account for the actual service conditions and assist the designer to optimize for service conditions and to select an appropriate service margin. When the service margin is too low, safety might be at risk and the reliability in terms of arrival times will be low. When the service margin is too high, the main engine will run most of the time at inefficient power settings and (future) energy efficiency design index (EEDI) requirements might not be met.
Within the present work we compared two recently developed empirical prediction methods, two established empirical methods developed in the 1970s and experimental data in regular waves and irregular seas. The first new method (STAWAVE2) predicts added resistance in head seas only and has been developed within the Sea Trial Performance Joint Industry Project (STA-JIP). The goal of this JIP was to improve transparency and accuracy of speed trials. One of the requirements was to deliver a reliable correction method for wave-added resistance. The second new method (SPAWAVE) is suitable for all wave directions and has been developed within the service performance analysis joint industry project (SPA-JIP). This JIP aimed at the reduction of fuel consumption by careful analysis of the vessel performance in service conditions.
Abeil, Bastien
Largest containership in the world ‘Triple-E’ first tested at MARIN! Journal Article
In: MARIN Report, no. 112, pp. 22-23, 2014.
Abstract | Links | BibTeX | Tags: added resistance in waves, Design for service, motions, seakeeping
@article{Abeil2014,
title = {Largest containership in the world ‘Triple-E’ first tested at MARIN!},
author = {Bastien Abeil},
url = {http://www.marin.nl/extra/marin-bladermodules/html/112/#22},
year = {2014},
date = {2014-08-01},
journal = {MARIN Report},
number = {112},
pages = {22-23},
abstract = {MARIN was delighted to take part in a truly historic milestone in the industry when Daewoo Shipbuilding and Marine Engineering (DSME) asked MARIN to investigate the seakeeping ability of what would become the largest container vessel in the world - Maersk Line’s Triple-E.},
keywords = {added resistance in waves, Design for service, motions, seakeeping},
pubstate = {published},
tppubtype = {article}
}
MARIN was delighted to take part in a truly historic milestone in the industry when Daewoo Shipbuilding and Marine Engineering (DSME) asked MARIN to investigate the seakeeping ability of what would become the largest container vessel in the world - Maersk Line’s Triple-E.
Hooijmans, Patrick; van der Meij, Karola; Greening, David; Yu, Lai
Traditions broken in modern container ship design Conference
Design & Operation of Container Ships, 21-22 May 2014, London, UK, The Royal Institute of Naval Architects, 2014.
Abstract | Links | BibTeX | Tags: containerships, Fuel consumption, seakeeping
@conference{Hooijmans2014,
title = {Traditions broken in modern container ship design},
author = {Patrick Hooijmans and Karola van der Meij and David Greening and Lai Yu},
url = {http://test.sssri-marin.com/wp-content/uploads/2016/01/Paper-Traditions-broken-in-modern-container-ship-design.pdf
http://www.rina.org.uk/Containership2014.html},
year = {2014},
date = {2014-05-21},
booktitle = {Design & Operation of Container Ships, 21-22 May 2014, London, UK},
publisher = {The Royal Institute of Naval Architects},
abstract = {The design of a say 5 year ‘young’ container ship is usually the result of an optimisation for maximum speed at design draught. Such design is mostly the result of an attempt to reach the contractual speed. However, a well balanced modern container ship should be a compromise between minimum fuel consumption and maximum cargo capacity across an intended or forecasted operational profile. In the design process, the focus should not only be on the calm water resistance and propulsive aspects but also the added resistance due to wind and waves should be considered, as well as the cavitation behaviour and related propeller induced pressure pulses. The SAVER 10000 developed for and in cooperation with the Canadian Owner Seaspan Ship Management Limited (Seaspan) is a pioneer in this new approach to balance the minimum fuel consumption and maximum loadability, taking into account the aspects as indicated.},
keywords = {containerships, Fuel consumption, seakeeping},
pubstate = {published},
tppubtype = {conference}
}
The design of a say 5 year ‘young’ container ship is usually the result of an optimisation for maximum speed at design draught. Such design is mostly the result of an attempt to reach the contractual speed. However, a well balanced modern container ship should be a compromise between minimum fuel consumption and maximum cargo capacity across an intended or forecasted operational profile. In the design process, the focus should not only be on the calm water resistance and propulsive aspects but also the added resistance due to wind and waves should be considered, as well as the cavitation behaviour and related propeller induced pressure pulses. The SAVER 10000 developed for and in cooperation with the Canadian Owner Seaspan Ship Management Limited (Seaspan) is a pioneer in this new approach to balance the minimum fuel consumption and maximum loadability, taking into account the aspects as indicated.
2013
Jaap van Heerd Rob Grin, Victor Ferrari
Hydrodynamic Aspects in the Design of Passenger Vessels Conference
International Conference on Design & Operation of Passenger Ships, London, UK, The Royal Institution of Naval Architects 2013.
Abstract | BibTeX | Tags: comfort, cruise, ferries, maneuvering, passenger, powering, seakeeping
@conference{Grin2013,
title = {Hydrodynamic Aspects in the Design of Passenger Vessels},
author = {Rob Grin, Jaap van Heerd, Victor Ferrari},
year = {2013},
date = {2013-11-20},
booktitle = {International Conference on Design & Operation of Passenger Ships, London, UK},
organization = {The Royal Institution of Naval Architects},
abstract = {The present paper discusses in detail the principal hydrodynamic aspects that challenge the design of passenger vessels. This type of ship must not only have good efficiency and operability for keeping tight time schedules, but must also provide comfort and ensure safety to the passengers. To achieve a proper balance between these different aspects the designer must face and solve particular issues, distinctive of this kind of vessel. Recent hydrodynamic studies performed at MARIN, both numerical and experimental, have provided information on this topic and are presented in this paper.},
keywords = {comfort, cruise, ferries, maneuvering, passenger, powering, seakeeping},
pubstate = {published},
tppubtype = {conference}
}
The present paper discusses in detail the principal hydrodynamic aspects that challenge the design of passenger vessels. This type of ship must not only have good efficiency and operability for keeping tight time schedules, but must also provide comfort and ensure safety to the passengers. To achieve a proper balance between these different aspects the designer must face and solve particular issues, distinctive of this kind of vessel. Recent hydrodynamic studies performed at MARIN, both numerical and experimental, have provided information on this topic and are presented in this paper.
2012
Grin, Rob
On The Prediction Of Wave Added Resistance Conference
11th International Marine Design Conference (IMDC), Glasgow, UK, 2012.
Abstract | Links | BibTeX | Tags: added resistance in waves, sea margin, sea trial, seakeeping, speed loss, STA JIP
@conference{Grin2012,
title = {On The Prediction Of Wave Added Resistance},
author = {Rob Grin},
url = {http://www.marin.nl/web/News/News-items/On-The-Prediction-Of-Wave-Added-Resistance.htm
},
year = {2012},
date = {2012-06-11},
booktitle = {11th International Marine Design Conference (IMDC), Glasgow, UK},
abstract = {There is continuous research on analytical, numerical and (semi-)empirical methods to predict wave added resistance. Most of this research focuses on a particular area, like motion induced wave added resistance, wave added resistance in short waves or is limited to head seas only. The practical application of most methods is therefore often limited. Moreover, most methods require detailed information on hull lines and results are rather sensitive to the discretisation of those hull lines. Since 2006, MARIN has been investigating the feasibility of empirical methods which do not have those limitations. They only require the main particulars to predict wave added resistance. Within the Sea Trial Analysis joint industry project (STA-JIP), a method was developed for the correction of wave added resistance in head seas covering both the motion induced and the wave reflection induced component. This method was further refined and extended to all wave directions within the service performance analysis JIP (SPA-JIP) in 2008.
This paper presents the results of the comparison between the prediction methods and model tests for almost 50 different ships, comprising more than 1500 tests in regular and irregular seas.},
keywords = {added resistance in waves, sea margin, sea trial, seakeeping, speed loss, STA JIP},
pubstate = {published},
tppubtype = {conference}
}
There is continuous research on analytical, numerical and (semi-)empirical methods to predict wave added resistance. Most of this research focuses on a particular area, like motion induced wave added resistance, wave added resistance in short waves or is limited to head seas only. The practical application of most methods is therefore often limited. Moreover, most methods require detailed information on hull lines and results are rather sensitive to the discretisation of those hull lines. Since 2006, MARIN has been investigating the feasibility of empirical methods which do not have those limitations. They only require the main particulars to predict wave added resistance. Within the Sea Trial Analysis joint industry project (STA-JIP), a method was developed for the correction of wave added resistance in head seas covering both the motion induced and the wave reflection induced component. This method was further refined and extended to all wave directions within the service performance analysis JIP (SPA-JIP) in 2008.
This paper presents the results of the comparison between the prediction methods and model tests for almost 50 different ships, comprising more than 1500 tests in regular and irregular seas.
This paper presents the results of the comparison between the prediction methods and model tests for almost 50 different ships, comprising more than 1500 tests in regular and irregular seas.
2011
Dallinga, Reint
Prediction of added resistance of ships in waves under further scrutiny Journal Article
In: MARIN Report, no. 104, pp. 12-13, 2011.
Abstract | Links | BibTeX | Tags: added resistance in waves, CFD, motions, seakeeping
@article{Dallinga2011,
title = {Prediction of added resistance of ships in waves under further scrutiny},
author = {Reint Dallinga},
url = {http://www.marin.nl/web/Publications/Publication-items/Prediction-of-added-resistance-of-ships-in-waves-under-further-scrutiny.htm},
year = {2011},
date = {2011-12-01},
journal = {MARIN Report},
number = {104},
pages = {12-13},
institution = {MARIN },
abstract = {MARIN investigates the merits of a Rankine source method in the prediction of added resistance.},
keywords = {added resistance in waves, CFD, motions, seakeeping},
pubstate = {published},
tppubtype = {article}
}
MARIN investigates the merits of a Rankine source method in the prediction of added resistance.
2010
Reint Dallinga, J E Bos
Cruise ship seakeeping and passenger comfort Conference
International Conference On Human Performance at Sea, Glasgow, Scotland, United Kingdom, HPAS 2010.
Abstract | Links | BibTeX | Tags: accelerations, comfort, cruise, ferries, motions, passengers, seakeeping
@conference{Dallinga2010,
title = {Cruise ship seakeeping and passenger comfort},
author = {Reint Dallinga, J E Bos},
url = {http://www.marin.nl/web/Publications/Publication-items/Cruise-ship-seakeeping-and-passenger-comfort.htm},
year = {2010},
date = {2010-06-16},
booktitle = {International Conference On Human Performance at Sea, Glasgow, Scotland, United Kingdom},
organization = {HPAS},
abstract = {In the last decade the design and construction of a substantial volume of large cruise ships has stimulated the evolution of cruise ship design. The MARIN and TNO involvement in these developments, and in particular the increase in size, have lead to new insights in how the ship design governs passenger discomfort.
Our contribution to the conference highlights our experience with the link between passenger comfort and cruise ship design by identifying the particular seakeeping qualities of cruise ships that govern passenger comfort and showing the impact the most important choices in cruise ship design on these governing factors. Attention is paid to the effect of combined motions and roll stabilisation on seasickness, the discomfort introduced by slamming induced whipping and to postural stability.},
keywords = {accelerations, comfort, cruise, ferries, motions, passengers, seakeeping},
pubstate = {published},
tppubtype = {conference}
}
In the last decade the design and construction of a substantial volume of large cruise ships has stimulated the evolution of cruise ship design. The MARIN and TNO involvement in these developments, and in particular the increase in size, have lead to new insights in how the ship design governs passenger discomfort.
Our contribution to the conference highlights our experience with the link between passenger comfort and cruise ship design by identifying the particular seakeeping qualities of cruise ships that govern passenger comfort and showing the impact the most important choices in cruise ship design on these governing factors. Attention is paid to the effect of combined motions and roll stabilisation on seasickness, the discomfort introduced by slamming induced whipping and to postural stability.
Our contribution to the conference highlights our experience with the link between passenger comfort and cruise ship design by identifying the particular seakeeping qualities of cruise ships that govern passenger comfort and showing the impact the most important choices in cruise ship design on these governing factors. Attention is paid to the effect of combined motions and roll stabilisation on seasickness, the discomfort introduced by slamming induced whipping and to postural stability.
2008
Dallinga, Reint; van Walree, Frans; Grin, Rob; Koning, Jos
Seakeeping issues in the design of containerships Conference
Design & Operation of Container Ships 2008, The Royal Institute of Naval Architects 2008.
Abstract | Links | BibTeX | Tags: added resistance in waves, containerships, Design for service, motions, seakeeping, speed loss
@conference{Dallinga2008,
title = {Seakeeping issues in the design of containerships},
author = {Reint Dallinga and Frans van Walree and Rob Grin and Jos Koning},
url = {http://www.marin.nl/web/Publications/Papers/Seakeeping-issues-in-the-design-of-containerships.htm
http://www.rina.org.uk/search_publications.html},
year = {2008},
date = {2008-01-01},
booktitle = {Design & Operation of Container Ships 2008},
organization = {The Royal Institute of Naval Architects},
abstract = {While the advanced art of minimising the installed power for a given speed has a clear role in the design of container ships, the place of seakeeping is less well established. The incidental character of seakeeping problems at sea in combination with the fact that building for good seakeeping may decrease the container capacity and increase the building costs seems a major reason for this, in addition to the sheer complexity of the issues. The present paper
addresses the last point with an effort to give a complete review of the seakeeping issues in containership design. Based on recent experience from model tests the work explores the physical nature of the involuntary speed loss in waves and reasons for a voluntary speed reduction (green water loads, whipping accelerations due to bow and stern slamming, engine racing) or change in course (exposure of containers to wave crests, rolling). In addition a review is given of the extreme behaviour that the master would like to avoid altogether, like excessive heel due to loss of stability in following seas and parametric roll. Based on the results tentative design guidance is formulated.},
keywords = {added resistance in waves, containerships, Design for service, motions, seakeeping, speed loss},
pubstate = {published},
tppubtype = {conference}
}
While the advanced art of minimising the installed power for a given speed has a clear role in the design of container ships, the place of seakeeping is less well established. The incidental character of seakeeping problems at sea in combination with the fact that building for good seakeeping may decrease the container capacity and increase the building costs seems a major reason for this, in addition to the sheer complexity of the issues. The present paper
addresses the last point with an effort to give a complete review of the seakeeping issues in containership design. Based on recent experience from model tests the work explores the physical nature of the involuntary speed loss in waves and reasons for a voluntary speed reduction (green water loads, whipping accelerations due to bow and stern slamming, engine racing) or change in course (exposure of containers to wave crests, rolling). In addition a review is given of the extreme behaviour that the master would like to avoid altogether, like excessive heel due to loss of stability in following seas and parametric roll. Based on the results tentative design guidance is formulated.
addresses the last point with an effort to give a complete review of the seakeeping issues in containership design. Based on recent experience from model tests the work explores the physical nature of the involuntary speed loss in waves and reasons for a voluntary speed reduction (green water loads, whipping accelerations due to bow and stern slamming, engine racing) or change in course (exposure of containers to wave crests, rolling). In addition a review is given of the extreme behaviour that the master would like to avoid altogether, like excessive heel due to loss of stability in following seas and parametric roll. Based on the results tentative design guidance is formulated.
2007
van Heerd, Jaap
Five decades of innovation and a great future Journal Article
In: MARIN Report, no. 90, pp. 10, 2007.
Abstract | Links | BibTeX | Tags: comfort, cruise, ferries, maneuvering, passengers, powering, seakeeping
@article{vanHeerd2007,
title = {Five decades of innovation and a great future},
author = {Jaap van Heerd},
url = {http://www.marin.nl/web/Publications/MARIN-Report/All-issues/MARIN-Report-2007/Five-decades-of-innovation-and-a-great-future.htm},
year = {2007},
date = {2007-02-01},
journal = {MARIN Report},
number = {90},
pages = {10},
abstract = {MARIN started the first investigations into passenger vessels around 1950. During the last decades the size of the vessels, the available power and the requested service speeds have increased dramatically. This requires innovative hull form designs and extensive numerical and experimental research. Report takes a look at some of the highlights of the last 50 years.},
keywords = {comfort, cruise, ferries, maneuvering, passengers, powering, seakeeping},
pubstate = {published},
tppubtype = {article}
}
MARIN started the first investigations into passenger vessels around 1950. During the last decades the size of the vessels, the available power and the requested service speeds have increased dramatically. This requires innovative hull form designs and extensive numerical and experimental research. Report takes a look at some of the highlights of the last 50 years.