Results 281 to 290 of about 2,250,364 (348)
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Homoclinic Phenomena in Ship Motions
Journal of Ship Research, 2017In the article will be reviewed the changes of ship motion patterns originating from a special class of phase space phenomena identified in the nonlinear dynamics literature as homoclinic (When the term appears in italic, it will imply truly homoclinic as well as heteroclinic events).
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Journal of Ship Research, 1970
The problem discussed concerns small motions of a ship, in all six degrees of freedom, but at zero speed of advance, due to an incident wave system in shallow water of depth comparable with the ship's draft. The problem is completely formulated for an arbitrary ship, and is partially solved for the case when the ship is slender and the wavelength much ...
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The problem discussed concerns small motions of a ship, in all six degrees of freedom, but at zero speed of advance, due to an incident wave system in shallow water of depth comparable with the ship's draft. The problem is completely formulated for an arbitrary ship, and is partially solved for the case when the ship is slender and the wavelength much ...
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Ship motion measurement filter design
IEEE Journal of Oceanic Engineering, 1977A procedure is presented for designing Kalman filters to measure linear and angular ship motion parameters using realistic models of the ship motion dynamics. The design is based on the state space modeling of ship motion dynamics. The designed filters exhibited significant accuracy improvement (order of magnitude) over filters which do not model ship ...
I. Weiss, T. DeVries
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Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology, 2019
For operations at sea it is important to have a good estimate of the current local sea state. Often, sea state information comes from wave buoys or weather forecasts. Sometimes wave radars are used.
B. Mak, B. Düz
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For operations at sea it is important to have a good estimate of the current local sea state. Often, sea state information comes from wave buoys or weather forecasts. Sometimes wave radars are used.
B. Mak, B. Düz
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Ship motion modeling and simulation in Ship Handling Simulator
2012 International Conference on Audio, Language and Image Processing, 2012For developed irregular waves, wave heights or wave amplitudes are gained using the wave spectrums. Based on the hypothesis of Froude-Krylov, ship shape is predigested box. Wave forces and moments to ship motion can be calculated. They are added in the motion mathematical models, and ship six degrees of freedom mathematical models are given.
Zhang Xiufeng +4 more
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Transactions of the Institute of Measurement and Control, 2019
This paper proposes a prediction method of ship motion attitude with high accuracy based on the long short-term memory neural network. The model parameters should be initialized randomly, resulting in critical decreases of the nonlinear learning ability ...
Xiuyan Peng, Biao Zhang, Haiguang Zhou
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This paper proposes a prediction method of ship motion attitude with high accuracy based on the long short-term memory neural network. The model parameters should be initialized randomly, resulting in critical decreases of the nonlinear learning ability ...
Xiuyan Peng, Biao Zhang, Haiguang Zhou
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Mechanics of sailing ship motion
Mathematica Applicanda, 2015The Author, looking into the rules defining the sailing ship efficiency, delineates a number of mathematical equations that are proved in practice to be accurate. The equation of the sailing ship efficiency in a downwind sector is similar to the curves from Wulff grid, while the equation in an windward sector is similar to the fourth degree curve, not ...
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Ship motion attitude prediction model based on IWOA-TCN-Attention
Ocean Engineering, 2023Biao Zhang +4 more
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