基于特征的多分辨FEM模型快速生成*

作者：吴海胖，刘玉生 日期：2010-06-28/span> 浏览：3127 查看PDF文档

基于特征的多分辨FEM模型快速生成*
吴海胖，刘玉生
（浙江大学 CAD & CG国家重点实验室，浙江 杭州 310058）

摘要：为了提高有限元分析效率，对零件进行不同精度的有限元分析应该使用不同分辨的零件有限元网格(FEM)模型。针对这一需要，提出了一种基于特征的多分辨FEM模型快速生成方法。首先确定出零件所有特征之间的接口；然后对零件所包含的每一个设计特征和分析特征进行了以相关接口为约束的网格划分；最后根据不同的特征层次结构选择相应的特征及其网格组合产生零件不同分辨的FEM模型。实验结果表明该方法快速而有效。
关键词：计算机辅助设计；有限元分析；多分辨有限元网格；CAD模型简化；网格重用
中图分类号：TH164；TP391文献标识码：A文章编号：1001-4551(2010)06-0012-06

A fast approach to feature-based multi-resolution FEM model generation

WU Hai-pang, LIU Yu-Sheng
(State Key Laboratory of CAD & CG, Zhejiang University, Hangzhou 310058, China)

Abstract: To improve the efficiency of finite element analysis(FEA), multi-resolution finite element mesh (FEM) models meeting different precision requirements of analysis are needed. To support the generation of multi-resolution FEM model, a fast feature-based approach was presented. Firstly, the interfaces between features of the part were determined; then, the mesh models of each design feature and analysis feature were generated by taking related interfaces as constraints; finally, according to the level of detail (LOD), the corresponding features and their mesh models were selected to compose the multi-resolution FEM model of the part. The test results indicate that the method is fast and effective.
Key words: computer aided design(CAD); finite element analysis(FEA); multi-resolution finite element mesh(FEM); CAD model simplification; mesh reuse