Abstract: The present paper describes a numerical method for predicting the wave field produced by a segmented wave generator undergoing specified motions in a wave basin which may contain partially reflecting sides. The approach used is based on linear diffraction theory and utilizes a point source representation of the generator segments and any reflecting walls that are present. The method involves the application of a partial reflection boundary condition which is discussed. Numerical results are presented for the wave field due to specified wave generator motions in a rectangular basin. Cases which are considered include both perfectlys aborbiag and partially reflecting beaches along the basin sides, as well as the presence of perfectly reflecting short side-walls near the generator. The method can be used to account adequately for the effects of wave diffraction and partial reflections, and to predict the generated wave field realistically.

Key words: diffraction theory, segmented wave generator, snake principle, point source, phase shift, transmission coefficient

摘要： 本文对实验室中具有部分反射边墙的港池由分块式生波机所产生的波场的数学模型进行讨论。这种方法是根据线性绕射理论,应用点源来代替分离式生波机和反射边墙,并对部分反射边界条件进行讨论。本文主要给出矩形港池的数值结果,其中包括全反射边界、全吸收边界和部分反射边界。这种方法能够考虑到绕射和部分反射的影响。合理地预测所产生的波场。

关键词: 绕射理论, 分块式生波机, 蛇形生波理论, 点源, 相位滞后, 透射系数