文献类型：期刊文献

中文题名：CAD网格模型的逆向CSG建模

英文题名：Reverse CSG modeling of CAD mesh model

作者：杨全欧 李志辉 贾晓红 石卫波 严冬明

第一作者：杨全欧

机构：[1]贵州理工学院航空航天工程学院,贵州贵阳550003;[2]北京流体动力科学研究中心,北京100011;[3]中国科学院数学与系统科学研究院,北京100190;[4]中国空气动力研究与发展中心超高速空气动力研究所,四川绵阳621000;[5]中国科学院自动化研究所,北京100190

第一机构：贵州理工学院航空航天工程学院

年份：2025

卷号：40

期号：4

起止页码：394-410

中文期刊名：高校应用数学学报(A辑)

外文期刊名：Applied Mathematics A Journal of Chinese Universities(Ser.A)

收录：;北大核心:【北大核心2023】；

语种：中文

中文关键词：网格分割;重建CSG;命名规则;基元拟合;布尔运算

外文关键词：mesh segmentation;constructing CSG;naming rules;primitive fitting;boolean operation

摘要：针对复杂机械构型的3D网格难以全自动重建CSG(Constructive Solid Geom-etry)模型的问题,文中提出了一种半自动交互式CAD(Computer Aided Design)网格模型重建CSG方法.制定了布尔运算的模型命名规则.首先采用适度用户交互的半自动分割方法对网格模型进行分割,以布尔树结构将分割模型导出并相应命名,获得批量具备几何基元特征的网格文件;改进基元拟合函数,建立了适于命名规则的自动拟合平台,对网格文件批量拟合,获得可供CSG生成的中间文本文件;基于OCC(Open CASCADE)构建了以中间文本为输入的基元生成与布尔运算系统,实现了CSG模型的自动生成.在类天宫飞行器复杂网格模型上进行CSG重建,获得了模型的绝大部分细节,具备与原模型高度吻合的表面特性.在自动方法难以处理的穿孔模型上,成功重建出实体模型.
In order to solve the problem that the 3D mesh of complex mechanical configuration is difficult to reconstruct the CSG(Constructive Solid Geometry)model automatically,a semi-automatic interactive method for reverse CSG modeling of CAD(Computer Aided Design)mesh model is proposed.The naming rules of Boolean operation model are established.Firstly,a semi-automatic segmentation method with moderate user interaction is used to segment the mesh model.In this process,the segmented model is exported and named according to the Boolean tree structure,and a batch of mesh files with primitive characteristics are obtained.Then,the primitive fitting function is improved to automatically fit the batch mesh files according to the naming relationship,and the intermediate text file for CSG generation is obtained.Finally,the primitive fitting and Boolean operation model with the intermediate text as the input is constructed based on OCC(Open CASCADE),and the automatic generation of CSG model is realized.The CSG re-construction is carried out on the complex mesh model of Tiangong-type spacecraft,and most of the details of the model are obtained,which has highly consistent surface characteristics with the original model.The method is applied to the pierced pattern model which is difficult to construct by automatic method,and the corresponding solid model is successfully obtained.