Results 31 to 40 of about 676 (199)
Components of Roll Damping of Ship at Forward Speed
Journal of the Society of Naval Architects of Japan, 1978 A method for predicting the roll damping of a ship at forward speed is proposed. The roll damping is assumed to be divided into five components, that is, the frictional, the wave making, the eddy making and the lift components of the hull, and the bilge keel one.
Ikeda, Yoshiho +2 more
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Numerical Analysis of the Effect of Passive Free Surface Tank on Rolling Motion of Batang-Type Traditional Fishing Vessel [PDF]
TransNavShip accidents are caused by various factors, one of which is excessive roll motion that can lead to capsizing. To address excessive rolling, the passive free surface tank device is a potential solution that can be applied.
Deddy Chrismianto +4 more
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Analytical solution of nonlinear rolling motion of ship using the method of multiple scales [PDF]
مجله مدل سازی در مهندسی, 2017 In this research, the nonlinear rolling motion of ships is studied. After obtaining the governing equation of roll motion, the method of multiple scales perturbation technique is applied to solve the nonlinear differential equation.
Mohammad Mahdi Jalili +2 more
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Applied Ocean ResearchShips face potential risks of damage from navigation environments and human factors. The multiphase flow of ship-water-ice particularly increases the difficulty of evaluating the roll damping characteristics of a damaged ship in ice floes.
XinLong Zhang +4 more
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Use of Tunnel- and Azimuthing Thrusters for Roll Damping of Ships
IFAC-PapersOnLine, 2016 Abstract: This paper presents a novel technique of active roll damping in marine vessels by sole use of conventional thrusters. Many marine operations, such as crane operation and helicopter landing, should be carried out in small and steady roll motions. However, active roll damping devices such as fins and rudders lose their efficiency in low-speed
Sigbjørn Eng Rudaa +2 more
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A Coupled SVM-NODE Model for Efficient Prediction of Ship Roll Motion
Journal of Marine Science and EngineeringTraditional analyses of ship roll damping and added moment of inertia rely on free roll decay and forced roll tests, but acquiring linear (small angles) and nonlinear (large angles) relationships demands extensive computational cases and parameter ...
Yaxiong Zheng +3 more
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Mathematical and Computational Applications, 2021 In this work, the response of a ship rolling in regular beam waves is studied. The model is one degree of freedom model for nonlinear ship dynamics. The model consists of the terms containing inertia, damping, restoring forces, and external forces.
Muhammad Usman +2 more
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Roll motion characteristics of a polar research ship with ice accumulation in beam waves
International Journal of Naval Architecture and Ocean EngineeringStability of polar vessels could be deteriorated due to ice accumulation, making it crucial to investigate the dynamic behavior of the vessel under harsh polar conditions. In this work, the effect of ice accumulation on the roll motion characteristics of
Jianzhang Qi +5 more
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Beni-Suef University Journal of Basic and Applied Sciences, 2017 In this paper, we have introduced an efficient Legendre wavelet spectral method (LWSM) to ship roll motion model for investigating the nonlinear damping coefficients.
D. Sathyaseelan, G. Hariharan, K. Kannan
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Rudder Roll Stabilization Based on Arc Tangent Nonlinear Feedback for Ships
Journal of Marine Science and Engineering, 2020 The rudder is used for damping the roll motion of a ship. Study of this motion is the essence of this paper. The responses of yaw and roll motions are different as the rudder angle varies.
Jian Zhao, Cailei Liang, Xianku Zhang
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