改进的栅格法三维六面体网格局部加密算法  

IMPROVED GRID-BASED PARTIAL REFINEMENT ALGORITHM OF THREE-DIMENSIONAL HEXAHEDRAL MESHES

作　　者：孙劲光[1] 周勃[2] 

机构地区：[1]辽宁工程技术大学电子与信息工程学院,辽宁葫芦岛125105 [2]辽宁工程技术大学研究生学院,辽宁葫芦岛125105

出　　处：《计算机应用与软件》2016年第1期49-52,共4页Computer Applications and Software

基　　金：国家科技支撑计划项目(2013BAH120f00)

摘　　要：有限元网格的相容性及质量是网格划分中必须考虑的问题。针对现有加密模板生成的新增单元数目较多,网格质量不佳,容易产生大范围加密外延,且在使用时加密情况考虑较为简单的问题,在栅格法生成六面体网格的基础上提出了一套基于8分法的加密模板,改进了面模板中新增小网格质量较差的问题,增加了拐角模板。为了使得所有加密情况均能直接加密,给出加密模板与网格单元中加密节点所有可能的排列情况之间的对应法则,并给出加密模板的集体应用方法。通过实验结果及对比分析,该套模板能够减少新增单元数量,改善新增单元的质量,减少加密外延现象。The compatibility and the quality of finite element mesh are the problems have to be taken into account in grid partition. Existing refinement template generates more number of new cells, its grid quality is not good, is easy to produce a wide range of refinement extension, and considers simply in conditions of the refinement. In view of these problems, based on generating the hexabedral mesh with grid method, we present a set of eight-refinement-based refinement template. This set of template improves the problem of poorer qualities of newly added meshes in surface template, and increases comer template. In order to make all the refinement conditions be directly refined, we give the corresponding rule between all possible layout conditions of the refinement points in refinement template and grid cells, and provide the collective application method of template. By experimental results and their comparative analyses, the set of templates can decrease the number of new cells, improves the quality of new cells, and reduces refinement extension phenomena.

关 键 词：局部加密 网格质量优化 三维六面体网格 加密模板 栅格法 自适应 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]