基于特征的静态装配CAD模型全局对称性识别方法

发布时间：2018-06-04 22:35

本文选题：装配体 + CAD模型　；参考：《计算机辅助设计与图形学学报》2017年05期

【摘要】：为降低装配CAD模型CAE分析的运算规模,提出一种全方位利用装配CAD模型的装配关系、以一致构件集为对称性识别单元识别静态装配CAD模型全局对称性的方法.首先构建配合图,同时利用装配关系实现装配体构件局部坐标到全局坐标转换;然后从装配级、零件级、几何级自上而下地实现一致构件集划分,再分别利用单约束与多约束规则确定一致构件集对称性;最后根据一致构件集序列顺序,通过对称性合并与验证逐步确定装配CAD模型全局对称性.实验结果表明,该方法能有效地识别装配CAD模型全局对称性.
[Abstract]:In order to reduce the computational scale of CAE analysis of assembly CAD model, a method is proposed to identify the global symmetry of static assembly CAD model by using the assembly relation of assembly CAD model and the uniform component set as symmetry recognition unit. First of all, the matching diagram is constructed, and the local coordinate to the global coordinate of the assembly component is transformed by the assembly relation, then the uniform component set is divided from the assembly level, the part level, and the geometry level from the top to the bottom. Then the uniform component set symmetry is determined by single constraint rule and multi-constraint rule respectively. Finally, the global symmetry of assembly CAD model is determined step by symmetry merging and verification according to the sequence of uniform component set. Experimental results show that this method can effectively recognize the global symmetry of assembly CAD model.
【作者单位】：河海大学物联网工程学院;常州市图形图像与骨科植入物数字化技术重点实验室;
【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);国家自然科学基金青年项目(51605142) 江苏省科技支撑计划(BE2014048)
【分类号】：TP391.7

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