浮泥海床上孤立波的粘滞衰减

Viscous Damping of Solitary Waves Over Fluid-mud Seabed

本文将海底浮泥作为粘性流体处理,利用分层流体模型,首次研究了浅水孤立波在浮泥海床上的衰减。在分层流体模型中引入了三个边界层,理论推导分析得出了边界层内外的流速分布;由边界层内粘滞能量损失推求出波高沿程衰减系数。为证明本文理论,采用天津新港浮泥进行了水槽实验,实测波高沿程衰减与理论预测值符合良好。

In this paper an analytical solution is presented for solitary waves propagating over fluid-mud seabed. In the theoretical analysis three boundary layers are introduced to satisfy the boundary conditions of motion. The first order approximation are derived for the velocities in the irrota-tional cores and boundary layers, as well as the dissipation rates of wave heights. The laboratory experiment results are compared favourably with the theoretical prediction.