透空式防坡堤周围的非线性波浪传播的数值模拟  

Math Model of Non-linear Wave Propagation Near Permeable Breakwater

作　　者：李熙[1] 严以新[1] 

机构地区：[1]河海大学交通和海洋工程学院,南京210098

出　　处：《水道港口》2004年第2期84-85,100,共3页Journal of Waterway and Harbor

基　　金：华东师范大学河口与海岸重点实验室开放基金项目(200207);河海大学创新基金及交通与海洋学院科研基金(301028)

摘　　要：对非线性波浪在透空式防波堤周围的波浪变形进行了数值模拟,在Boussinesq波浪方程中加入与透空建筑物有关的新耗散项,从而界定了透空建筑物引起的部分反射和透射,波浪折射—衍射的传播过程通过控制方程求解。波浪控制方程通过有限差分方法求解。模型应用于模拟波浪经过具有部分反射的群桩式透空结构,结果表明透空式防波堤可以有效地衰减波浪和作为重力式结构的一种替代方式。Wave partial/full reflection and transmission by wave-permeable structure as solving wave-absorbing function with the focus on understanding of wave attenuation is considered.For determination of absorbing-reflection effects,the wave-absorbing expression is applied in depth averaged Boussinesq type wave equations in simulating the non-linear wave transmission.Accurate predictions of reflected and transmitted results combined with diffraction-refraction effects around the wave-permeable breakwater for various incident-wave condtions is obtained.The results show that wave permeable breakwaters with proper absorbing effects can be used as an effective alternative to massive gravity breakwaters in reduction of wave transmission in shallow water.

关 键 词：透空式防波堤 BOUSSINESQ方程 波浪传播 部分反射和透射 

分 类 号：TV139.2[水利工程—水力学及河流动力学] O242[理学—计算数学]