摘要
基于加速度势和高阶边界元,建立了船舶在波浪中运动和载荷的三维时域数值分析方法.由于加速度势和流体速度势,除物面边界条件以外,满足相同的定解条件,因此均可以采用以时域自由面格林函数为积分核的边界积分方程进行求解.为了数值求解边界积分方程,本文采用八节点二阶曲面元对船体表面进行了离散,同时,基于形函数得到了速度势的空间偏导数.最后,利用所开发的数值算法对Wigley RT型船的兴波阻力和Wigley I型船的运动响应进行了计算,并与公开发表的试验结果进行了对比,初步验证了算法的适用性.
A 3D time domain method based on acceleration potential and higher-order description of ship hull has been developed to predict wave induced ship motions and loads.Both the velocity potential and acceleration potential are solved by boundary integral equations,with the transient free surface Green function as integral kernel.The eight nodes higher-order panels are used to discrete the integral equations,and the corresponding shape functions are applied to compute the spatial partial derivatives of the velocity potentials.Good agreement with the published experimental measurements demonstrates that the present method is reliable in a number of applications.
作者
李志富
任慧龙
石玉云
LI Zhi-fu;REN Hui-long;SHI Yu-yun(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《船舶力学》
EI
CSCD
北大核心
2019年第9期1034-1044,共11页
Journal of Ship Mechanics
基金
Supported by the National Natural Science Foundation of China(Grant No.51709131)~~
关键词
船舶运动
加速度势
高阶面元
格林函数
ship motion
acceleration potential
higher-order panel
Green function
