船舶航行时水动力系数求解二维半理论的稳定算法  

A Stable algorithm of 2.5D theory for estimation of hydrodynamic forces on ships with forward speed

作　　者：段文洋[1] 马山[1] 

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《船舶力学》2004年第4期27-34,共8页Journal of Ship Mechanics

基　　金：教育部优秀博士学位论文作者专项基金资助项目(199927);国家自然科学基金资助项目(10272035)

摘　　要：给出一种基于高速细长体理论的预报排水型船在波浪上运动水动力求解的数值方法。在该理论的定解条件中,自由面条件是三维的,而控制方程和物面条件则是二维的,所以称为二维半理论。采用二维时域自由面Green函数将定解问题转化为船体切片上的积分方程,进而求解有航速下的船舶水动力问题。重点讨论了水动力计算的稳定算法。对ITTC建议的标准WIGLEY船型作了理论预报,并与DELFT大学的实验结果和用STF切片法的理论预报结果作了比较。比较结果表明,本文提出的二维半理论的预报结果与试验结果相当接近,而计算效率和切片法相当,且大大改善了理论预报的精度。A numerical method for solving the hydrodynamic problem of high-speed displacement ship is presented.It is called 2.5D theory,where the free-surface condition is 3D but the control equation and body surface condition are 2D. The 2D transient free-surface Green function is used to formulate the integral equation on the strips of body surface.A stable algorithm for solving the hydrodynamic coefficients is presented.Numerical predictions are compared with the experiment results of a Wigley hull recommended by ITTC,as well as the theoretical results by STF strip method.It is found that the present method can give improved prediction of the hydrodynamic coefficients with comparative computing time of STF strip method.

关 键 词：船舶航行 水动力系数 求解 二维半理论 稳定算法 时域Green函数 

分 类 号：U661.313[交通运输工程—船舶及航道工程]