M. Kerkvliet, Carette; Straten, O. van
Analysis of free surface anti-roll tank using URANS. Verification and validation Conference
13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark, 2016.
@conference{Kerkvliet2016,
title = {Analysis of free surface anti-roll tank using URANS. Verification and validation},
author = {Kerkvliet, M., Carette, N. and Straten, O. van},
url = {http://www.marin.nl/web/Publications/Papers/Analysis-of-free-surface-antiroll-tank-using-URANS.-Verification-and-validation-1.htm},
year = {2016},
date = {2016-09-04},
booktitle = {13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark},
pages = {ID055},
abstract = {To prevent excessive roll motion of ships operating in seas, damping systems are often required. Exterior systems can be used like, bilge keels or active stabilizer fins, or interior systems like anti-roll tanks (ARTs). There are mainly two sorts of ARTs, i.e. free surface tanks and Utype tanks. Both types have been studied extensively in the past, e.g. by Watts (1883), Frahm (1911) and Verhagen and Wijngaarden (1965), but also more recently, e.g. by Lee and Vassalos (1996), Kerkvliet et al. (2014) and Carette (2015). The content of this paper is restricted to the free surface type ART, which is nowadays often used to increase the roll damping of ships passively. The main advantages of such an ART are the large damping moment at small roll amplitudes and the ease to adapt the response by changing the water level. The response of the tank is highly frequency and amplitude dependent with a strong non-linear character (Carette et al., 2016). Also the shape of the interior geometry, e.g. additional struts, plates or other flow obstructions, will have an effect on the response, which makes it difficult to predict the response by analytical models. Therefore, systematic oscillation tests are often performed by model-scale experiments or by use of Computational Fluid Dynamics (CFD). This paper shows the response of a two-dimensional (2D) and three-dimensional (3D) model-scale free surface ART using the CFD code ReFRESCO (www.refresco.org). The objective of this paper is to show which issues are important when CFD is used as a research and design tool. A verification and validation study is performed to determine numerical settings to obtain a good trade-off between accuracy and computational costs. The CFD results are validated against model-scale experimental results, based on the work of Carette (2015). The results show that CFD can be used as a simulation driven design tool to accurately predict the response of an ART.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
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}
}
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}
}
2016
M. Kerkvliet, Carette; Straten, O. van
Analysis of free surface anti-roll tank using URANS. Verification and validation Conference
13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark, 2016.
Abstract | Links | BibTeX | Tags: anti-roll tank, ART, CFD, free surface, ReFRESCO, URANS, verification and validation
@conference{Kerkvliet2016,
title = {Analysis of free surface anti-roll tank using URANS. Verification and validation},
author = {Kerkvliet, M., Carette, N. and Straten, O. van},
url = {http://www.marin.nl/web/Publications/Papers/Analysis-of-free-surface-antiroll-tank-using-URANS.-Verification-and-validation-1.htm},
year = {2016},
date = {2016-09-04},
booktitle = {13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark},
pages = {ID055},
abstract = {To prevent excessive roll motion of ships operating in seas, damping systems are often required. Exterior systems can be used like, bilge keels or active stabilizer fins, or interior systems like anti-roll tanks (ARTs). There are mainly two sorts of ARTs, i.e. free surface tanks and Utype tanks. Both types have been studied extensively in the past, e.g. by Watts (1883), Frahm (1911) and Verhagen and Wijngaarden (1965), but also more recently, e.g. by Lee and Vassalos (1996), Kerkvliet et al. (2014) and Carette (2015). The content of this paper is restricted to the free surface type ART, which is nowadays often used to increase the roll damping of ships passively. The main advantages of such an ART are the large damping moment at small roll amplitudes and the ease to adapt the response by changing the water level. The response of the tank is highly frequency and amplitude dependent with a strong non-linear character (Carette et al., 2016). Also the shape of the interior geometry, e.g. additional struts, plates or other flow obstructions, will have an effect on the response, which makes it difficult to predict the response by analytical models. Therefore, systematic oscillation tests are often performed by model-scale experiments or by use of Computational Fluid Dynamics (CFD). This paper shows the response of a two-dimensional (2D) and three-dimensional (3D) model-scale free surface ART using the CFD code ReFRESCO (www.refresco.org). The objective of this paper is to show which issues are important when CFD is used as a research and design tool. A verification and validation study is performed to determine numerical settings to obtain a good trade-off between accuracy and computational costs. The CFD results are validated against model-scale experimental results, based on the work of Carette (2015). The results show that CFD can be used as a simulation driven design tool to accurately predict the response of an ART.},
keywords = {anti-roll tank, ART, CFD, free surface, ReFRESCO, URANS, verification and validation},
pubstate = {published},
tppubtype = {conference}
}
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}
}
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}
}