斜坡堤栅栏板护面波浪爬高数值模拟

以海堤工程中常用的栅栏板护面为例,采用源函数造波法研究了栅栏板糙率对波浪爬高的影响。结果表明:在线性规则波作用下,波浪爬高衰减系数随着斜坡堤坡面糙率的增大而减小,当糙率为0.40～0.50时,波浪爬高衰减系数在0.6～0.7之间变化;当糙率大于0.50时,波浪爬高衰减系数随着斜坡堤坡度的变缓有增大的趋势。当波陡较小时,在相同糙率条件下,斜坡堤坡度越缓,爬高衰减系数越小;波陡较大时,随着斜坡堤坡度的变缓,波浪爬高衰减系数先增后减。

Numerical simulation of wave run-up on fence panels of sloping dikes

Taking fence panels,commonly used in sea dike projects,as an example,the influence of fence panel roughness on wave run-up was analyzed using the source wave-generating method.The results show that the attenuation coefficient of wave run-up(Kp) decreases with the increase of roughness for a linear regular wave.When roughness has values in the range of 0.40-0.50,Kp ranges from 0.6 to 0.7.When roughness is greater than 0.50,Kp increases with the decrease of the sloping dike.With the same roughness,the slower the slope of the dike is,the smaller Kp is for small wave steepness.When wave steepness increases,Kp increases at first and then decreases with the decrease of the sloping dike.