基于部分先验识别的B-Rep模型全局对称性识别方法  

Global Symmetry Detection for B-Rep Models Based on Partial-Prior Recognition

作　　者：龚沁 蒋俊锋[1,2] 陈正鸣[1,2] 何坤金[1,2] 黄瑞[1,2] Gong Qin;Jiang Junfeng;Chen Zhengming;He Kunjin;Huang Rui(College of Internet of Things Engineering, Hohai University, Changzhou 213022;Key Laboratory of Graphics, Images and Orthopedic Implants, Changzhou 213022)

机构地区：[1]河海大学物联网工程学院,常州213022 [2]常州市图形图像与骨科植入物数字化技术重点实验室,常州213022

出　　处：《计算机辅助设计与图形学学报》2017年第2期384-392,共9页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家自然科学基金青年项目(61403120);国家自然科学基金面上项目(61472118);江苏省科技支撑计划(BE2014048)

摘　　要：B-Rep模型对称性识别能有效地提高CAE分析效率.针对现有方法通过识别B-Rep模型所有局部对称性来确定全局对称性,效率较低的问题,提出一种基于部分先验识别的B-Rep模型全局对称性识别方法.该方法以一致面集为对称性识别单元,首先利用先验知识快速确定部分局部对称性,然后通过几何推理逐步缩小候选对称性识别范围,最终快速确定B-Rep模型全局对称性.实验结果证明,文中方法鲁棒性高且识别速度快.Detecting symmetries of B-Rep models can greatly improve the efficiency of CAE analysis. The efficiency of the existing methods is quite low because all the local symmetries of B-Rep models must be detected in advance. A method, based on partial prior recognition, is proposed to detect the global symmetries for B-Repmodels. The congruent face set is taken as the unit for symmetry detection. Firstly, the priori knowledge is used toquickly determine the part of the local symmetries. Secondly, the candidate symmetry identification range is shrunk gradually by geometric reasoning. Consequently, the global symmetries of the B-Rep model are determined.Experimental results show that the proposed method is robust and fast.

关 键 词：B-REP模型 对称检测 一致面集 合并对称 验证对称 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]