基于隐式参数化设计的车身焊点布局优化研究  

Research on Optimization of Body Spot Weld Layout Based on Implicit Parametric Design

作　　者：武振江 杨建森 曹建 吴杨 WU Zhen-jiang;YANG Jian-sen;CAO Jian;WU Yang(CATARC(Tianjin)Automotive Engineering Research Institute Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]中汽研(天津)汽车工程研究院有限公司第三开发本部,天津300300

出　　处：《机械设计与制造》2022年第2期29-32,共4页Machinery Design & Manufacture

基　　金：国家重点研发计划专项—高性能纯电动四驱SUV整车集成开发技术(2018YFB0106100)。

摘　　要：对基于分析驱动设计的白车身焊点布局多目标优化进行研究。首先建立隐式参数化白车身关键零部件模型,以实现有限元模型的快速更新,并验证其准确性。利用Isight优化平台集成参数化模型和相关计算模块实现后台全自动运算功能。以焊点数量最小,扭转刚度最大为目标,焊点的间距为设计变量,采用NSGA-II算法对白车身进行轻量化多目标优化设计。优化结果表明:在扭转刚度基本不变的前提下,焊点总数量与初始值相比减少了179个,优化效果明显,同时计算效率较高,证实了隐式参数化设计结合Isight优化平台方法在汽车平台开发设计方面的高效性与实用性。Based on the analysis driven design,the multi-objective optimization ofBIW(Body In White)spot weld layout was studied. Firstly,the implicit parametric BIW key parts model was established to quickly change and update the finite element model,and the accuracy of the model was verified. To realize the full automatic operation function in the background,the parameterized model and related calculation modules were integrated in Isight optimization platform. The minimum number of spot welds and the maximum torsional stiffness were taken as the objectives,and the spacing of spot welds were taken as the design variable. NSGA-II algorithm was used to carry out the lightweight multi-objective optimization design of BIW. The optimization results show that On the premise that the torsional stiffness is basically unchanged,the total number of spot welds is reduced by 179 compared with the initial value. The optimization effect is obvious,and the calculation efficiency is high,which proves the efficiency and practicability of implicit parametric design combined with Isight optimization platform method in the development and design of automobile platform.

关 键 词：隐式参数化 焊点布局 多目标优化设计 有限元仿真 

分 类 号：TH16[机械工程—机械制造及自动化] U462.3[机械工程—车辆工程]