船模不规则波中顶浪运动数值模拟研究  

Numerical simulation of ship motions in irregular head waves

作　　者：石博文[1] 刘正江[1] 吴明[2] 

机构地区：[1]大连海事大学航海学院,辽宁大连116026 [2]海军大连舰艇学院航海系,辽宁大连116018

出　　处：《船舶力学》2014年第8期906-915,共10页Journal of Ship Mechanics

摘　　要：基于粘性流理论建立了三维数值波浪水池,生成了高精度的ITTC谱和白噪声波谱的长峰不规则波,通过同时求解描述船舶流场的RANS方程和刚体运动学方程,结合网格整体移动方法,实现了船模不规则波中顶浪运动的数值模拟,给出了DTMB5512船模不规则波中顶浪纵摇和垂荡运动时历,并通过频谱分析得到了纵摇和垂荡的频率响应函数,与势流理论计算结果及IIHR船模水池试验数据进行了比对,均吻合良好,证明了文中方法研究船舶耐波性问题的可行性。A computational fluid dynamics simulation method was developed to establish a 3D viscous numerical wave tank （NWT）, and high precision irregular waves of ITTC spectrum and white noise spectrum were generated. The problem of surface ship free motion in irregular head waves is predicted by solving the Reynolds Averaged Navier-Stokes （RANS） equations describing the flow around ship and the kinematics equation of rigid body simultaneously, and the moving grid method was used, which let all grids moving together according to the calculation results in each time step. The pitch and heave transfer functions for ship model DTMB5512 in irregular wave were obtained. The simulation results are examined by the comparisons with strip theoretical results and experimental data from IIHR, and show good agreement, which demonstrates the ability of the present method to assess seakeeping characteristics.

关 键 词：船舶运动 计算流体力学 数值水池 频率响应函数 

分 类 号：U661.32[交通运输工程—船舶及航道工程]