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Numerical Simulation of Naval Ship's Roll Damping Based on CFD [PDF]
Procedia Engineering, 2012 Roll damping test is used to calculate roll damping coefficient, which is an important coefficient in predicting ship seakeeping capability. And because of the complexity of naval ship's shape (with bulbous bow and transom stern), it's rare to find the ...
Wang, Zuo-chao, Yang, Boa, Wu, Ming
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Estimation of damping through internally excited roll tests [PDF]
Ocean Engineering, 2018 Roll damping represents a key factor for a proper estimation of the ship behaviour in a seaway. However, due to the typical dominance of viscous effects, accurately estimating roll damping is a challenging task.
Gabriele Bulian, Luis Pérez-Rojas
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A Robust Roll Damping Controller
IFAC Proceedings Volumes, 1997Abstract The effectiveness of rudder roll damping is sensitive to ship dynamic parameters. A recent model of a containership in waves include a non-linear model and wave response operators. The vessel is sensitive in roll and has a low metacentric height, with a long natural roll period of 25 s.
Chengen Yang, Mogens Blanke
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On the Nonlinear Ship Roll Damping Components [PDF]
, 1994 Scale model experiments of roll decay in calm water and forced roll in a regular beam sea have been conducted on several ship typologies. A methodology for the estimation of the roll equation parameters, based on nonlinear least squares fitting to the experimental data has been developed and implemented in a computer code.
Cardo A. +4 more
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A Mathematical Model for Roll Damping Prediction
Volume 2: CFD and VIV, 2015A ship in seaway is always prone to roll motion. For the safety of personnel, ship and cargo it is essential to optimize the roll damping properties of the hull shape in order to prevent exceeding roll angles. Therefore, a tool for the prediction of roll damping is an important requirement during the design phase of ship hulls.
Piehl, Henry, el Moctar, Bettar Ould
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Influence of bilge-keel configuration on ship roll damping and roll response in waves [PDF]
Ocean Engineering, 2020 The bilge keel, which is a widely used tool for passively reducing the roll motion of ships, generates and releases vortices periodically when the ship rolls, leading to dissipation of the roll kinetic energy and rise in the roll damping of the ship. The
Yichen Jiang, Yunfeng Ding, Yuan Sun
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Numerical Simulation of Roll Damping
Volume 4: Terry Jones Pipeline Technology; Ocean Space Utilization; CFD and VIV Symposium, 2006The highly viscous flow problem of roll damping of a FPSO is investigated by means of numerical solution of the unsteady two-dimensional Navier-Stokes equations. The finite volume method using non-structured grid is used to solve the integral form of the governing equations.
Juan B. V. Wanderley +4 more
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Experimental Investigation into the Effect of Roll Amplitude on Roll Damping
Journal of Shanghai Jiaotong University (Science), 2019An in-house large eddy simulation (LES) code has been developed in the previous study. In order to validate the code for simulation of roll motion, effect of roll amplitude on forced roll damping is experimentally investigated in a circulating water channel at Shanghai Jiao Tong University (SJTU). KRISO very large crude carrier 2 (KVLCC2) is taken as a
Xiaohui Zhang +4 more
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Responses of Roll Damping on Anti-rolling Tank Devices
OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean, 2008This paper shows a study on roll damping of anti-rolling tank (ART). A flexible passive ART that consists of two fixed reservoirs, a set of three connected ducts and a set of five connected air pipes is designed for carrying out experiments. Experiments were conducted in regular sinusoidal waves of small amplitude.
Phan Anh Tuan +3 more
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The Journal of the Acoustical Society of America, 1992
A cylinder has a roll shell that rotates around a fixed central axis. A first chamber arranged inside the cylinder is filled with liquid and transfers a supporting hydraulic force from the central axis to the shell. The first chamber is linked by a throttle to a second chamber located as well inside the cylinder, and in which is arranged for example a ...
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A cylinder has a roll shell that rotates around a fixed central axis. A first chamber arranged inside the cylinder is filled with liquid and transfers a supporting hydraulic force from the central axis to the shell. The first chamber is linked by a throttle to a second chamber located as well inside the cylinder, and in which is arranged for example a ...
openaire +1 more source