船舶在波浪中运动的非线性时域数值模拟  

Numerical simulations of nonlinear ship motions in waves by a Rankine panel method

作　　者：陈京普[1] 朱德祥[2] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]上海市激光技术研究所,上海200233

出　　处：《水动力学研究与进展（A辑）》2010年第6期830-836,共7页Chinese Journal of Hydrodynamics

摘　　要：为了可靠地模拟高速及大外飘船型在恶劣海况中的运动响应,该文在基于Rankine源的线性时域数值预报方法的基础上,通过在运动方程中添加考虑瞬时湿表面影响的非线性恢复力和入射波力,建立了船舶在波浪中运动的非线性时域数值模拟方法。该方法在数值计算中仍采用线性自由面条件、平均湿表面面元,采用数值海岸技术来满足自由面上的辐射条件。应用本文建立的非线性时域数值模拟方法对高速水面船DTMB5512和大外飘集装箱船Flokstra进行了顶浪状态下的数值模拟研究,数值计算结果表明非线性时域预报方法计算结果较线性方法更接近于试验结果,说明该文方法的有效性。Based on the linear time domain Rankine panel method,the nonlinear time domain simulation method of ship motions in waves is established by adding the nonlinear restoring and Froude Krylov forces terms on instantaneous wetted body surface to the equations of 6DOF motions.In this method,the linear boundary conditions on free and mean wetted body surface are still used,while numerical damping is adopted to satisfy the radiation conditions.The numerical simulations of DTMB5512 and Container Vessel Flokstra in regular head waves were carried out by the linear and nonlinear time domain simulation methods separately.The linear and nonlinear results were compared with that of experiments in this paper,and it shows that the numerical results of nonlinear method agree well with experimental data.It＇s also shown the present nonlinear time domain simulation method can be applied to predict the nonlinear ship motions in rough seas.

关 键 词：船舶 时域运动 非线性 面元法 RANKINE源 

分 类 号：U661.32[交通运输工程—船舶及航道工程]