摘要
文章以三维面元法为基础,开发了一套求解高速双体船在波浪中运动时耐波性的预报程序。该程序以三维移动脉动源格林函数为边界积分方程的基本内核,并根据该函数的对称特性及双体船辐射-绕射波的基本传播特征,采用三种方法来改进耐波性预报时的计算效率。以两条刘易斯船组成的双体船为计算对象,采用该程序求解了该船的水动力及运动响应,并和试验结果及未改进方法的预报结果进行了比较。分析表明文中方法的预报结果和试验结果吻合良好,且预报精度和未改进方法预报精度相当,而计算效率可达到未改进方法的2.9～4倍。因此该程序可作为高速双体船耐波性快速预报的有效方法。
Based on the 3D surface panel method, a fast-calculating computer code is developed in the present study to predict seakeeping performances for a high speed catamaran advancing in waves. The 3D translating-pulsating source Green function is chosen as the kernel function for the boundary element integral equation. Three methods based on the symmetry of the Green function together with performances of the radiation-diffraction waves are introduced in the code to improve the calculating efficiency. Validation is performed through studying hydrodynamic terms and free motions of a twin Lewis-form hulls by comparing model tests or predictions of the exact method（the method without improvement）. The predictions obtained by the present method show general agreement with the experiments and the accuracy can be kept almost the same as that obtained in the exact method. The calculating speed of the present method is about 2.9-4 times of that of the exact method in the case of CPU time test. The present solver may serve as a fast and valid tool to predict seakeeping performances of a high speed catamaran advancing at sea.
出处
《船舶力学》
EI
CSCD
北大核心
2014年第6期644-661,共18页
Journal of Ship Mechanics
基金
Supported by the National Natural Science Foundation of China(Grant No.50879090)
the Key Research Program of Hydrodynamics of China(Grant No.9140A14030712JB11044)
关键词
高速双体船
格林函数对称性
耐波性
计算效率
high speed catamaran
symmetry of Green function
seakeeping
calculating efficiency
