摘要
用线性抛物型近似的缓坡方程 ,计算了波浪入射角分别为 10°、2 0°和 3 0°时 ,平底和斜坡地形上直立式防波堤前的波浪场 .并以此波浪场为输入条件 ,分别计算了由欧拉流和 Stokes流组成的质量输移流以及辐射应力流 .计算表明 ,防波堤前的波浪场、水深、地形和波浪入射角对波浪引起水流的影响 。
The currents induced by wave motions are studied in front of a vertical breakwater with different wave incident angles. Firstly, large area wave fields are calculated by parabolic approximation of mild slope equation, for flat and varying bottom with slope 1∶100. Secondly, based on above results, the radiation stress flow and the mass transport velocity (Lagaragian velocity) composed by Eulerian velocity and Stokes drift are computed. It is demonstrated by the numerical results that the wave induced currents are influenced greatly by the variation of wave amplitudes in spatial domain, wave incident angles and wave nonlinearity. Enough attention should be paid to these phenomena in coastal engineering.
关键词
波浪场
直立式防波堤
质量输移流
辐射应力流
wave field
vertical breakwater
mass transport
Eulerian velocity
radiation stress velocity
