摘要
根据车身结构的需求,提出一种自动提取车身薄壁结构件简化模型的方法,旨在获得与梁-板混合结构适应的线-面简化模型。该简化模型由一维线状几何结构与二维片状几何结构组成,分别对应车身结构的梁构件与板构件。介绍了扫掠几何体的概念,并提出扫掠体能否近似局部区域的判据。基于此判据,分割给定薄壁梁模型,并通过区域扩展方法获得最终的扫掠与非扫掠区域。根据分割区域、该区域的扫掠属性以及邻接关系,构造与原始模型匹配的线-面简化模型。试验结果显示,所提出的自动方法可高效提取薄壁结构的简化模型。通过与人工建立的简化模型进行对比,验证所提方法的有效性。
A method was presented to automatically extract simplified models for thin-walled components of the vehicle body structure,aiming at obtaining a suitable geometric simplification for beam-plate-coupled automobile body structures.The simplified model consists of 1D lines and 2D planes,which correspond to the beam and plate components respectively.The paper started with defining the necessary conditions which determine whether the geometric sweep can be applied to the local regions for approximation.Based on these conditions,the beam-plate structure was segmented into initial local sweeping and non-sweeping regions.Then the simplified model was constructed based on the local regions with their sweep properties and connection types.The proposed method was proved to be highly efficient to obtain the target simplified model,and was validated by comparing the automatic extraction with the manual extraction.
作者
杨磊
李宝军
胡平
YANG Lei;LI Baojun;HU Ping(School of Automotive Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)
出处
《汽车工程学报》
2018年第2期88-96,共9页
Chinese Journal of Automotive Engineering
基金
国家自然科学基金(11472073
61370143)
中央高校基本科研业务费专项基金(DUT17C27)
关键词
薄壁结构
简化模型
车身概念建模
骨架提取
thin-walled structures
model simplification
vehicle conceptual modeling
skeletonization
作者简介
责任作者:杨磊(1989-),男,海南东方人。博士研究生,主要从事面向工程结构的计算机辅助设计算法研究。Tel:15040630607 E-mail:lyangdut@mail.dlut.edu.cn;通讯作者:李宝军(1977-),男,山东莱阳人。博士,讲师,主要研究方向为车身CAD,CAx集成。Tel:15104066009 E-mail:bjli@dlut.edu.cn
