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为消除波浪在水槽出流边界的反射及波浪遇到结构物后在入射边界形成的二次反射,基于时域高阶边界元方法建立三维完全非线性数值波浪水槽模型:利用源造波法产生入射波浪,采用人工阻尼层技术消除波浪反射及二次反射;建立水槽的格林函数并应用于整个计算域,消除水槽两侧壁和底面的积分,减少了计算量.利用所建模型分别对规则波和不规则波的数值实验表明,数值结果与理论解吻合良好,且在出流边界和入射边界均无反射现象.
In order to eliminate the reflection of the wave on the outflow boundary of the sink and the secondary reflection formed on the incident boundary after the wave encounters the structure, a three-dimensional completely nonlinear numerical wave sink model is established based on the high-order boundary element method in the time domain. In addition, using the artificial damping layer technology to eliminate the wave reflection and the second reflection, the Green’s function of the sink is established and applied to the entire calculation domain to eliminate the integral of the two sides and the bottom of the sink, thus reducing the computational load. The numerical experiments of wave and irregular wave show that the numerical results agree well with the theoretical solution, and there is no reflection at the outflow boundary and incident boundary.