粘性流中船舶自由横摇衰减运动数值模拟

以计算流体力学(CFD)理论为基础,基于商业CFD软件FLUENT平台经技术上一系列的二次开发,对某一无航速驳船的二维横剖面在静水中作自由横摇衰减运动进行了数值模拟,分析得到了船体剖面的横摇阻尼系数及固有周期,并与相关试验结果进行了比较,相对误差均小于3%.研究结果表明,数值方法能够对船舶自由横摇衰减运动进行有效地模拟,为预报船舶横摇运动特性提供了一条既有效又便捷的数值手段.

Numerical Simulation of Ship Free Roll Decay Motion in Viscous Flow

Based on Computational Fluid Dynamics(CFD) threory, a numerical simulation of free roll decay motion of a barge section without forward speed in calm water is carried out through the secondary development of the commerical CFD software FLUENT. The roll damping coefficient and the roll natural period of barge section are obtained which agree well with the corresponding experimental ones, the numerical uncertainties are shown to be less than 3%. The proposed method is shown to effectively simulate the free roll decay motion of ship, which demonstrates the ability to assess roll motion characteristics for ships effectively and conveniently.