设计特征模型到分析特征模型的自动转换方法  

An Approach to Automated Conversion from Design Feature Model to Analysis Feature Model

作　　者：曹伟娟[1] 陈晓申[1] 高曙明[1] 

机构地区：[1]浙江大学CAD&CG国家重点实验室,杭州310058

出　　处：《计算机辅助设计与图形学学报》2012年第8期1090-1098,共9页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金(60736019);国家"八六三"高技术研究发展计划(2008AA04Z115)

摘　　要：针对有限元分析建模的需求,提出一种将工程零件的设计特征模型自动转换为相应的分析特征模型的方法.首先将设计特征模型分解为所有正特征剩余体的集合,然后从各正特征剩余体中分解出一组扫成体和非扫成体,再采用基于二维轮廓的方法从各扫成体中确定出候选分析特征区域,最后通过合成候选分析特征区域得到真正的分析特征区域,并在此基础上生成分析特征和分析特征模型.实验结果表明该方法是有效的.An approach to automatically converting a design feature model to an analysis feature model for downstream finite element analysis is proposed. In the approach, the design feature model is first decomposed into a set of remnants of additive features, each of which represents part of an additive feature＇s volume that remain in the final volume of the design model. The remnant of each additive feature is then decomposed into swept bodies and non-swept bodies. After that, the candidate analysis regions of each swept body are effectively determined based on its contour information. These detected candidate regions may be wrongly recognized, so, together with potentially missing ones, they are thus detected and corrected by a synthesis process. Finally, the analysis features and their relative interfaces are generated, which ultimately gives the corresponding analysis feature model to the input design feature model. Experimental results are also shown to demonstrate the proposed method＇s effectiveness.

关 键 词：特征模型转换 设计特征模型 分析特征模型 有限元分析 混合维模型 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]