波浪力计算中的一个新边界元方法

本文就波浪与结构物作用问题，提出了一个新的高阶边界元方法。较之Ｅａｔｏｃｋ Ｔｏｙｌｏｒ和Ｃｈａｕ的方法，本文在体内附助积分方程中应用了满足刚性水面条件和弱刚性底面条件的简单格林函数。计算速度相应地有所提高；漂浮结构的积分方程更为简洁；计算结果与Ｅａｔｏｃｋ Ｔａｙｌｏｒ和Ｃｈａｕ的方法具有几乎相同的精度和收敛速度。

The Calculation of Wave Forces by Higher Order Boundary Element Method

For the calculation of wave forces on a three dimensional structure, the author proposed a new higher order boundary element method in this paper. By using a Green function inside the body which satisfies a solid condition on the free surface and a week solid condition on the sea bed, the sou'd angle value and the Cauchy Principal Value integrals in the integral equation of wave problem are calculated very efficiently. Numerical results show that this method gives very good result and its convergence is fast.