基于B样条的三维船体水动力数值计算(英文)

Numerical Calculation for Hydrodynamics of 3-D Ship Hull Based on B-Spline

本文采用基于B样条的一种新的数值方法计算三维船体水动力 ,用B样条函数表达三维船体表面的几何形状以及流场中未知物理量的分布。为了验证该数值方法的可行性和精确度首先对处于无限流体域中的圆球体绕流问题进行了计算 ;其次计算了由ITTC所推荐的Wigley船型的兴波阻力以及以一攻角斜航时的操纵水动力 ;最后在一些假设下对两船作平行航行时的干扰水动力作了相应计算工作。数值计算结果与其它试验或理论结果在定量或定性上吻合良好。

A numerical method based on B-Spline is developed for the hydrodynamic forces of 3-D ship hull.B-Spline functions are adopted to express 3-D ship hull geometry and unknowns in the fluid domain.Firstly,calculations were carried out for a spheroid with a constant speed in an unbounded flow to confirm the accuracy and feasibility of the numerical method.Secondly,wave-making resistance of Wigley recommended by ITTC and its hydrodynamics maneuvering at an attack angle were computed.Finally,the hydrodynamic interaction forces of two ships moving on parallel courses were finished under some assumptions.The calculated results agree quantitatively or qualitatively with some experimental/theoretical results.