The series expression of random wave drag forces is studied in this paper by means of nonlinear spectral analysis. A new method is proposed in this study since the derivative of the wave drag force is discontinuous. The characteristics of random process are used to obtain the coefficients of the series in this method. Numerical verification indicates that the series expression given in the paper approaches the original expression satisfactory. The maximum error is less than 4% when measured in the peak values of the time series and less 3% when measured in the root mean square values. That is to say, the series expression given in the study has reasonable accuracy and can be used in engineering computations. The application example indicates that the spectral densities of wave forces, as well as the root mean squares of wave forces, can be easily obtained without lose much accuracy using the series expression of wave drag forces.
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ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering
June 12–17, 2005
Halkidiki, Greece
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
0-7918-4196-0
PROCEEDINGS PAPER
Series Expression and Applications of Random Drag Forces Available to Purchase
Rujian Ma,
Rujian Ma
Jinan University, Jinan, Shandong, P. R. China
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Guixi Li,
Guixi Li
Jinan University, Jinan, Shandong, P. R. China
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Dong Zhao
Dong Zhao
Jinan University, Jinan, Shandong, P. R. China
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Rujian Ma
Jinan University, Jinan, Shandong, P. R. China
Guixi Li
Jinan University, Jinan, Shandong, P. R. China
Dong Zhao
Jinan University, Jinan, Shandong, P. R. China
Paper No:
OMAE2005-67288, pp. 713-718; 6 pages
Published Online:
November 11, 2008
Citation
Ma, R, Li, G, & Zhao, D. "Series Expression and Applications of Random Drag Forces." Proceedings of the ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 2. Halkidiki, Greece. June 12–17, 2005. pp. 713-718. ASME. https://doi.org/10.1115/OMAE2005-67288
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