Maneuverability in waves is important for the safety of ships and other marine vehicles. Conventionally, the maneuvering experiments are performed in still water at a constant forward velocity. In order to investigate the wave effects on ships steering, a series of towing tests with a Planer Motion Mechanism System (PMM) are carried out in waves in the present work. The ship model is forced to oscillate in horizontal plane at a low frequency when being towed forward at a small constant speed. As an extension of the previous work, the low-frequency oscillation of yaw motion is also considered. Hydrodynamic forces and the displacements of the ship model are measured throughout the tests. Then, the measured data are analyzed by the Fourier analysis to obtain components at different frequencies. By comparing the hydrodynamic forces measured in still water and that in waves, the wave effects on the maneuverability of ships are estimated. The variation of these nonlinear hydrodynamic coefficients against the wave amplitude and wavelength is examined.
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ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
June 19–24, 2011
Rotterdam, The Netherlands
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4435-9
PROCEEDINGS PAPER
Wave Drift Forces Affecting on Maneuverability Derivatives Available to Purchase
Takeshi Kinoshita,
Takeshi Kinoshita
University of Tokyo, Tokyo, Japan
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Weiguang Bao,
Weiguang Bao
University of Tokyo, Tokyo, Japan
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Hiroshi Itakura
Hiroshi Itakura
University of Tokyo, Tokyo, Japan
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Yongze Xu
University of Tokyo, Tokyo, Japan
Takeshi Kinoshita
University of Tokyo, Tokyo, Japan
Weiguang Bao
University of Tokyo, Tokyo, Japan
Hiroshi Itakura
University of Tokyo, Tokyo, Japan
Paper No:
OMAE2011-49166, pp. 877-884; 8 pages
Published Online:
October 31, 2011
Citation
Xu, Y, Kinoshita, T, Bao, W, & Itakura, H. "Wave Drift Forces Affecting on Maneuverability Derivatives." Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Materials Technology; Jan Vugts Symposium on Design Methodology of Offshore Structures; Jo Pinkster Symposium on Second Order Wave Drift Forces on Floating Structures; Johan Wichers Symposium on Mooring of Floating Structures in Waves. Rotterdam, The Netherlands. June 19–24, 2011. pp. 877-884. ASME. https://doi.org/10.1115/OMAE2011-49166
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