基于B_Rep的汽车覆盖件曲面自动补孔算法  

Filling holes algorithm for automobile panel based on B_Rep

作　　者：刘瑞军[1,2] 宋玉泉[1] 胡平[3] 郭威[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130022 [2]北华大学交通建筑工程学院,吉林省吉林市132013 [3]大连理工大学汽车工程学院,辽宁大连116024

出　　处：《吉林大学学报（工学版）》2009年第S2期292-295,共4页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(10125208;20000519)

摘　　要：根据孔的边界环是否处于一个面内,将孔分为单面孔和多面孔。利用拓扑关系搜索单面孔,通过比较孔所属包围盒的大小区分零件的外边界和多面孔。对于特征建模的单面孔,采用删除辅助特征的方法进行补孔操作,对于非特征建模或失去特征信息的单面孔将同多面孔一样,采用双三次Coons曲面补孔。该算法能够准确、快速实现补孔操作,为后续板料成形数值模拟中的接触算法提供必要的前提条件。Holes are divided into single-face hole and multiple-face hole whether boundary-loop of the hole is in one face:Single-face hole is be found by using topological relations and outer-boundary & multiple-face hole are distinguish by comparing volume of the bounding box.Single-face hole(s) of feature modeling was filled by deleting auxiliary feature.Single-face hole which the feature modeling information is not existed or lost was filled by using bi-cubic Coons surface as multiple-face hole.Hole(s) was filled accurately rapidly by algorithm,and provides necessary precondition for follow contact algorithm in numerical simulation of sheet forming process.

关 键 词：材料合成与加工工艺 补孔 边界 汽车覆盖件 

分 类 号：U463[机械工程—车辆工程]