Results 211 to 220 of about 3,246 (263)
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Journal of Ship Research, 1998
A nonlinear numerical method has been developed to compute motion responses for a ship traveling in steep ambient waves. The method is based on an approximate theory and is an extension to a well-established linear time-domain numerical method. The nonlinear solution is found to be greatly improved over the classical linear and quasi-nonlinear ...
Yifeng Huang, Paul D. Sclavounos
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A nonlinear numerical method has been developed to compute motion responses for a ship traveling in steep ambient waves. The method is based on an approximate theory and is an extension to a well-established linear time-domain numerical method. The nonlinear solution is found to be greatly improved over the classical linear and quasi-nonlinear ...
Yifeng Huang, Paul D. Sclavounos
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Journal of the American Society for Naval Engineers, 1952
This paper was presented in London on 28 June, 1951 before the International Conference of Naval Architects and Marine Engineers. The author who is a member of the Council of the American Society of Naval Engineers was initially sponsored by the Society of Naval Architects and Marine Engineers.
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This paper was presented in London on 28 June, 1951 before the International Conference of Naval Architects and Marine Engineers. The author who is a member of the Council of the American Society of Naval Engineers was initially sponsored by the Society of Naval Architects and Marine Engineers.
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IFAC Proceedings Volumes, 1993
Abstract In this paper we describe an indirect approach to short-term prediction of the rolling motion of ships. A key assumption used in the development is that for short time periods, the spectral content of the motion is concentrated in narrow-bands.
J.M. Fernandes, C.E. de Souza
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Abstract In this paper we describe an indirect approach to short-term prediction of the rolling motion of ships. A key assumption used in the development is that for short time periods, the spectral content of the motion is concentrated in narrow-bands.
J.M. Fernandes, C.E. de Souza
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Effect of ship motion on ship airwake aerodynamics
2020The effects of ship motion on the flow field over the deck of the ONR Tumblehome geometry were investigated experimentally. Characterization of the flow field is relevant in the context of safe aircraft operation in the wake region and to provide an accurate prediction of aircraft air-loads in simulators for pilots, and to provide a validation data set
Austin Krebill +5 more
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Resistance of a Ship Undergoing Oscillatory Motion
Journal of Ship Research, 2010In this paper, we describe extensions to the research of Doctors et al. (Doctors, L. J., Day, A. H., and Clelland, D., 2008, Unsteady effects during resistance tests on a ship model in a towing tank, Journal of Ship Research, 52, 4, 263–273) and Day et al. (Day, A. H., Clelland, D., and Doctors, L.
Doctors, Lawrence J. +2 more
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The motion of a ship at sea and the consequent motion sickness amongst passengers
Ergonomics, 1986Measurements were made of the motion of a ship, and of the consequent seasickness experienced by passengers. Data are presented for 17 voyages of up to 6 hours duration, involving 4915 passengers. Vertical motion occurred up to 1·0 m s−2 r.m.s. and vomiting incidence of up to nearly 40% was encountered.
Lawther, A., Griffin, M.J.
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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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Limiting Ship Motions for Small Ships in Heavy Seas
Ocean Engineering, 1997Abstract This paper presents two independent methodologies for defining the seakeeping performance of vessels in various sea conditions. The results of a unique series of sea trials are compared to a new time domain computer program (FREDYN) that predicts ship performance and dangerous operating conditions in extreme seas.
Grant A. Rossignol, William L. Thomas
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1979
Publisher Summary This chapter highlights that the oceangoing ships are designed to operate in a wave environment that is frequently uncomfortable and sometimes hostile. Unsteady motions and structural loading of the ship hull are two of the principal engineering problems that result.
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Publisher Summary This chapter highlights that the oceangoing ships are designed to operate in a wave environment that is frequently uncomfortable and sometimes hostile. Unsteady motions and structural loading of the ship hull are two of the principal engineering problems that result.
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On Nonlinear Ship Motions in Irregular Waves
Journal of Ship Research, 1966It is shown that the transfer functions characterizing the nonlinear response of ships in irregular seas can be obtained from high order moments of the ship motions by an extension of standard spectral-analysis techniques. Hence, full-scale measurements can be used to determine, for example, the coefficients of excess wave resistance and lateral drift.
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