水平多孔板导致之近岸陷波

在本文中，利用线性水波理论和本征函数展开方法，我们研究了附有一沉放在一定深度水下的水平多孔介质板之垂直岸壁的水波反射问题，数值模拟了水平多孔板的消浪特性，我们发现，通过在岸会加一水平的多孔人质薄板之后，将增加近岸处波浪反射和散射过程的复杂性，导致陷波现象发生，具有恰当可渗性能的多孔介质薄板将具有消浪特性，这时板的行为就象一个波浪吸收器一样，从而减少了岸壁的反射能力，降低了岸壁处及其临近的波高，板越

Wave Trapping near the Vertical Wall due to a Horizontal Submerged Porous Plate

By applying the linear water wave theory and the eigenfunction expansion method . the wave re-flection by a vertical wall with a horizontal submerged porous plate is investigated in this paper. The performance of the porous plate in reducing waves is revealed by our numerical results. It is found that the submerged plate increases the complexity of the phenomenon related to the wave reflection and refraction in the region near the wall, and leads to wave trapping. The results indicate that a plate with proper permeability has ability to de-crease wave height near the wall, and the behavior of a plate with proper porosity is similar to that of a wave ab-sorber which can significantly suppress not only the wave height above the plate but also the reflected waves. The ability of the porous plate of reducing the wave height on the wall surface is, in general, directly proportion-al to the dimensionless plate-length, and will be weakened as the relative submerged depth increases.