数值波浪水池中船舶水动力系数测试与分析技术

Estimation of Hydrodynamic Coefficients of Ship in Numerical Wave Tank

以CFD理论为基础,建立了数值波浪水池,给出了一种基于三维数值波浪水池的船舶水动力系数测试与分析技术。对Wigley-III船模在数值波浪水池中受迫振荡进行了数值模拟,计算分析了船体垂荡、纵摇及纵荡运动的附加质量与阻尼,并与三维势流理论计算结果进行了比较,两者吻合良好。此方法能准确给出浮式结构物的水动力系数,细致描述船舶周围的流场,可广泛应用于船舶与海洋工程浮式结构物的水动力性能研究。

A technique to estimate hydrodynamic coefficients of ship is outlined for ship oscillating in a 3-D numerical wave tank which is established based on CFD theory. The numerical simulation of ship model of Wigley Ⅲ forced oscillating in waves is carried out. The computational results of added mass and damping coefficients are obtained which agree well with the corresponding ones of potential theories. It is of great significance to further analyze and predict ship hydrodynamic performance in waves.