浅水波与圆弧型贯底式防波堤的相互作用

该文基于椭圆余弦波绕射理论,应用特征函数展开法,推导了浅水波对圆弧型贯底式多孔介质防波堤绕射的波势解,并据此解析计算了作用于防波堤的水平波浪载荷与浅水波波面分布。计算结果表明:浅水波入射角与非线性影响参数、海况条件以及防波堤几何条件等因素的相对变化对波浪作用均存在一定的影响,结构透空可以明显减弱防波堤所受波浪作用。与微幅波理论对比可知:在一定浅水条件下采用椭圆余弦波一阶分量模型所计算的最大无量纲波浪力、力矩和波面分布值均明显高于微幅波理论的对应估值,反映了水波非线性因素的影响效应。

Shallow water wave interaction with arc-shaped bottom-mounted breakwater

Based on cnoidal wave diffraction theory,the wave potential solutions to shallow water wave diffraction by arc-shaped bottom-mounted porous breakwater are derived by applying the eigenfunction expansion approach,and accordingly the horizontal wave loads on breakwater and wave free surfaces are analytically calculated.The evaluating results demonstrate that the variation of incident wave angle,nonlinear influence parameter of wave,sea water condition,and breakwater structure geometry condition may have some influence on shallow water wave effects on breakwater and that the porosity of lateral surface of arc-shaped breakwater may lead in an obvious reduction in wave effects.Compared with small amplitude wave theory,it is known that in certain shallow water conditions the results of maximum dimensionless wave forces,moments and wave free surfaces from first order cnoidal wave theory are obviously larger than those predicted by small amplitude wave theory for shallow water,it denotes that cnoidal wave theory can reflect wave nonlinear effects.