应用时域格林函数方法模拟有限水深中波浪对结构物的作用  

Numerical simulation of wave action on structures using the time-domain Green function

作　　者：滕斌[1] 韩凌[2] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]中国船级社北京技术开发研究所,北京100006

出　　处：《水动力学研究与进展（A辑）》2006年第2期161-170,共10页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(50025924);长江学者和创新团队发展计划资助(IRT0420)

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。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.

关 键 词：时域 有限水深 格林函数 波浪力 

分 类 号：TV139.2[水利工程—水力学及河流动力学]