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提要:本文提出了一种计算短波折射和绕射综合作用的二维有限单元数值模型。求解的波动方程适用于底坡缓和海域里的小振幅表面重力波的传播。本文提出了一种有效的计算格式,这种格式能够求解需要大量计算格点的实际问题。本文还将有限单元法计算的结果跟解析解、二维数值解、三维数值解、以及水力学模型的实测资料进行了比较。
Abstract: This paper presents a two-dimensional finite element numerical model for calculating the combined effect of shortwave refraction and diffraction. The wave equation solved is suitable for the propagation of small amplitude surface gravity wave in the gentle slope of the slope. This paper presents an efficient computational format that solves the practical problem of requiring large computations of grid points. The result of finite element method is also compared with analytic solution, two-dimensional numerical solution, three-dimensional numerical solution and measured data of hydraulic model.