V形贯底式防波堤上波浪作用力的解析研究

用解析方法计算V形贯底式防波堤在波浪绕射作用下周围流域任意点的速度势,研究波浪作用在V形贯底式防波堤上的波浪力。假定防波堤刚性、薄壁、不透浪、水深恒定。假想的圆柱面将整个流场划分为三个区域,分别在每个区域内将速度势用特征函数展开,然后在公共边界上按照速度连续,速度势连续的原则进行匹配,求得流域中任意一点的速度势和作用在V形贯底式防波堤上的总波力和总波力矩。数值结果给出了作用在防波堤上的波浪力随防波堤张角、入射波波长、入射角变化的曲线。结果表明:作用在V形贯底式防波堤上的波浪力与水深、防波堤的张角、入射波的波长等因素有关。

Analytical research on the wave force exerted on V-shaped bottom-mounted breakwaters

An analytical method is developed to study wave potential in the fluid domain around V-shaped bottom-mounted breakwater in order to determine the wave pressure exerted on it in this paper.The breakwater is assumed to be rigid,thin,impermeable and located in water of constant depth.The fluid domain is divided into three sub-regions by imaginary interface.The velocity potential in each region is expanded by eigenfunctions.By satisfying continuity of normal velocity and velocity potential across the imaginary fluid interface,the velocity potential everywhere and wave forces and moments on the breakwater are calculated.Numerical results,in the form of curve,are presented for a range of wave and breakwater parameters.Results show the forces and moments exerted on V-shaped bottom-mounted breakwaters are related with water depth,breakwater parameters,wave parameters and so on.