缓慢调制波在多孔海床上的演化

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基金项目: 国家自然科学基金资助项目

Evolution of Slowly Modulated Wave Train on Porous Sea Bed

1.
Shanghai University of Technology; Shanghai Institute of Applied Mathematics and Mechanics, Shanghai;
2.
Shanghai Jiaotong University, Shanghai

摘要: 本文采用多重尺度法分析了具有缓慢调制的波列在多孔海床上的演化问题.海床上部波浪采用了势流理论,海床下部的渗流采用了Darcy定律.两者在海床面上进行衔接,从而导出了上部波浪的波幅一阶和二阶的调制方程,并求出了相应的解,下部渗压场的解亦同时给出.

Abstract: In this paper, the problem of evolution of slowly modulated wave train on porous sea bed is investigated with the method of multiple scales. For the sea water in the upper region, the classical potential theory is used while the fluid motion in the porous sea bed is described by Darcy's law. The equations of the first and second order modulations of wave amplitude are derived by using matching conditions on the sea bed. The corresponding solutions are found and seepage pressures are also given at the same time.

[1]	梅强中,《水波动力学》.科学出版社(1984).
[2]	钱伟长(主编).《奇导摄动理论及其在力学中的应用》,科学出版社(1981)
[3]	Liu,P.L-F.,Damping of Waves over a Porous Bed,J.of Hydraulics Div.,ASCE,99,(1972),2263-2271.
[4]	Macpherson,H.,The attenuation of waves over a nonrigid bed,J.F.M.,97(1980),721-742.
[5]	唐苓,海事结构物所受海床渗压计算,第二届青年力学年会(1988).

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