中文摘要：

该文采用时域内满足自由水面条件的格林函数方法对无限和有限水深中波浪与任意形状三维物体相互作用所产生的绕射和辐射问题进行了理论研究和数值计算.建立了不包含自由水面积分的积分方程,消除了自由项系数.文中计算了各种形状三维物体在无限水深和有限水深情况下所受到的绕射和辐射波浪力,并与解析解以及频域理论进行了对比,结果符合良好,验证了本文所提理论的正确性.

英文摘要：

A three-dimensional time-domain approach is used to study the wave loads and body motion. In this approach, the exact body boundary condition is satisfied on the wetted body surface while the free-surface boundary conditions are linearized. An integral equation with a transient free-surface Green function is derived, in which the integration on the free surface and the free term coefficient are removed. Numerical results of diffraction and radiation for the hemi-sphere, sphere, cylinder, box and taper are presented. The agreement between the present computation and the results from the frequency domain analysis is good.