Probability distribution of random wave-current forces

doi:10.1016/j.oceaneng.2005.09.015

IOCAS-IR > 海洋环流与波动重点实验室

	Probability distribution of random wave-current forces
	Song, Jin-Bao
	2006-12-01
发表期刊	OCEAN ENGINEERING
ISSN	0029-8018
卷号	33 期号:17-18 页码:2435-2453
文章类型	Article
摘要	Based on the second-order solutions obtained for the three-dimensional weakly nonlinear random waves propagating over a steady uniform current in finite water depth, the joint statistical distribution of the velocity and acceleration of the fluid particle in the current direction is derived using the characteristic function expansion method. From the joint distribution and the Morison equation, the theoretical distributions of drag forces, inertia forces and total random forces caused by waves propagating over a steady uniform current are determined. The distribution of inertia forces is Gaussian as that derived using the linear wave model, whereas the distributions of drag forces and total random forces deviate slightly from those derived utilizing the linear wave model. The distributions presented can be determined by the wave number spectrum of ocean waves, current speed and the second order wave-wave and wave-current interactions. As an illustrative example, for fully developed deep ocean waves, the parameters appeared in the distributions near still water level are calculated for various wind speeds and current speeds by using Donelan-Pierson-Banner spectrum and the effects of the current and the nonlinearity of ocean waves on the distribution are studied. (c) 2006 Elsevier Ltd. All rights reserved.; Based on the second-order solutions obtained for the three-dimensional weakly nonlinear random waves propagating over a steady uniform current in finite water depth, the joint statistical distribution of the velocity and acceleration of the fluid particle in the current direction is derived using the characteristic function expansion method. From the joint distribution and the Morison equation, the theoretical distributions of drag forces, inertia forces and total random forces caused by waves propagating over a steady uniform current are determined. The distribution of inertia forces is Gaussian as that derived using the linear wave model, whereas the distributions of drag forces and total random forces deviate slightly from those derived utilizing the linear wave model. The distributions presented can be determined by the wave number spectrum of ocean waves, current speed and the second order wave-wave and wave-current interactions. As an illustrative example, for fully developed deep ocean waves, the parameters appeared in the distributions near still water level are calculated for various wind speeds and current speeds by using Donelan-Pierson-Banner spectrum and the effects of the current and the nonlinearity of ocean waves on the distribution are studied. (c) 2006 Elsevier Ltd. All rights reserved.
关键词	Random Waves Current Forces Probability Distribution Nonlinearity
学科领域	Engineering, Civil ; Engineering, Ocean ; Oceanography ; Water Resources
DOI	10.1016/j.oceaneng.2005.09.015
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000242197400011
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/5300
专题	海洋环流与波动重点实验室
作者单位	Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Song, Jin-Bao. Probability distribution of random wave-current forces[J]. OCEAN ENGINEERING,2006,33(17-18):2435-2453.
APA	Song, Jin-Bao.(2006).Probability distribution of random wave-current forces.OCEAN ENGINEERING,33(17-18),2435-2453.
MLA	Song, Jin-Bao."Probability distribution of random wave-current forces".OCEAN ENGINEERING 33.17-18(2006):2435-2453.

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