基于时域格林函数法的船舶有航速问题数值求解(英文)

Numerical Solution for Ship with Forward Speed Based on Transient Green Function Method

为了解决船舶以恒定速度在波浪中运动的水动力问题,文章开发了基于瞬时格林函数方法的三维时域计算程序。从数值精度和计算效率的角度出发,采用了精细时程法和一些数学上的推导计算时域格林函数的波动部分及其导数。并对Wigley型船进行了数值计算,通过水动力系数与试验数据及文献结果的比较,验证了三维时域计算程序的可靠性。

A 3-D time domain program based on transient Green function method was developed to analyze hydrodynamic problems involving ship moving at a constant forward speed. From the point of view of the numerical accuracy and calculation efficiency, the precise integration method and some mathematical derivations were employed to evaluate the memory part of the transient Green function and its derivatives. And numerical tests were carried out for a Wigley-hull-form ship; the obtained results are compared with experimental data and reference results. Through the comparisons on the hydrodynamic coefficients, the reliability of the 3-D time domain program is confirmed.