【作者】 吴乘胜； 朱德祥； 顾民；

【Author】 WU Cheng-sheng ZHU De-xiang GU Min (China Ship Scientific Research Center,Wuxi 214082,

【机构】 中国船舶科学研究中心；

【摘要】 本研究基于 NS 方程,建立了三维数值波浪水池。数值计算中控制方程采用 FVM 离散,非线性自由面使用 VOF 法处理;在入口边界模拟柔性造波板运动产生入射波,使用位于波浪水池尾部的人工阻尼区消波。首先对非线性规则波和不规则波进行了模拟;接着对规则波中顶浪前进的拘束船模水动力进行了计算;同时还进行了航行船舶辐射问题的数值模拟, 研究船舶垂荡和纵摇运动的附加质量与阻尼;最后进行了数值波浪水池中船舶顶浪运动的模拟研究。所有的数值计算结果都分别与理论解、目标谱(值)和试验数据进行了比较、分析.更多还原

【Abstract】 A 3D numerical wave tank is developed by solving NS equations in this paper.The governing equations are discretized by finite volume method.Volume of fluid method is adopted to deal with the nonlinear free surface.The incident waves are generated from the inflow boundary by prescribing a velocity profile resembling flexible flap wavemaker motions,and the outgoing waves are dissipated inside an artificial damping zone located at the rear part of the wave tank.In this paper, nonlinear regular and irregular waves are simulated firstly.Then the hydrodynamic forces of a restrained ship model advancing in regular head waves are computed.Radiation problems of the ship model with forward speed are also simulated to investigate the hydrodynamic mass and damping coefficients for heave and pitch motions.Simulation of wave-induced ship motions in regular head waves inside the numerical wave tank is carried out finally.All the results of numerical simulations are compared with theoretical result,targets or experimental data respectively.更多还原