动网格技术中局部重构方法的改进研究  

Improvement of local reconstruction method in dynamic meshing technique

作　　者：王志东[1] 吴贺贺[1] 杨爽[1] 陈明明[1] 

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2012年第6期523-527,共5页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51279070);江苏省高校自然科学研究重大项目(12KJA-580001)

摘　　要：Delaunay三角化方法是生成非结构网格常用的方法之一,其生成效率比阵面推进法高,但布点能力较弱.在解决大位移运动时常用方法是网格局部重构,但网格重构会增加计算工作量.文中针对局部重构方法中的窗口边界确定方法进行研究,提出了一种改进方法,不仅可以提高Delaunay三角化方法的布点能力,而且省去了繁琐的窗口边界提取步骤,提高了运动网格计算速度和网格质量;利用无量纲半径作为程序全局变量,在保证网格质量的前提下,提高了运动网格的智能性,减少了人工干预.Delaunay triangle method is one of commonly used methods for generating unstructured grids. It is of higher effectiveness but weaker ability for stationing points compared with advancing frorit method. The local re construction method is essential for solving problems involving geometric deformation and largedisplacement mo tion, while the reconstruction of grids will increase the computational workload. Aiming at defining window boundaries of the local reconfiguration method, we propose an improved method, which will improve the statio ning ability of Delaunay triangle method, avoid the tedious steps in extracting window boundary, and boost com putational speed and assure the quality of the grid. Under the condition of guaranteeing mesh quality, we use the dimensionless radius as a global variable, which increases the intelligence of program and reduces manual inter vention.

关 键 词：Delaunay三角化方法 动网格 局部重构算法 窗口边界 网格质量 

分 类 号：O241.82[理学—计算数学]