摘要
车身轻量化设计对汽车的节能减排有重要意义,为了对处于开发后期的某运动型多用途车(SUV)车型进行减重优化,应用代理模型技术搭建白车身优化流程。首先建立SUV白车身有限元模型,对扭转刚度性能进行仿真分析并作为优化设计的约束条件,通过两次灵敏度分析,筛选出66个关键部件,38个设计变量,基于Isight优化平台,进行试验设计并构建了代理模型,以车身质量为目标,采用HYBRID算法对关键部件的厚度进行尺寸优化设计。优化后的白车身扭转刚度基本保持不变,车身质量得到降低。此优化流程在车型开发后期的白车身减重方面具有良好效果。
The body lightweight design is of great significance to the energy saving and emission reduction of vehicles.In order to reduce the weight of a certain sport utility vehicle(SUV)model in the late stage of development,the agent model technology is applied to build the body in white optimization process.Firstly,the finite element model of SUV body in white is established,and the torsional stiffness performance is simulated and analyzed as the constraint condition of optimization design.Through two sensitivity analyses,66 key components and 38 design variables are screened.Based on Isight optimization platform,the design of experiments is carried out and a angent model aiming at the body mass is constructed.The HYBRID algorithm is used to optimize the thickness of key components.After optimization,the torsional stiffness of the body in white is basically unchanged,and the body mass is reduced.This optimization process has a good effect on body in white weight reduction in the late stage of vehicle development.
作者
卞翔
李占营
董彦龙
高文亮
BIAN Xiang;LI Zhanying;DONG Yanlong;GAO Wenliang(School of Electromechanical and Power Engineering,Jiangsu University of Science and Technology,Suzhou 215600,China;Zhangjiagang Great Wall Motor R&D Company Limited,Suzhou 215600,China)
出处
《汽车实用技术》
2024年第7期54-58,共5页
Automobile Applied Technology
基金
江苏省自然科学基金项目(BK20201002)
江苏省高等学校自然科学基金(20KJB130002)。
关键词
白车身
轻量化
有限元分析
代理模型
尺寸优化
Body in white
Lightweight
Finite element analysis
Agent model
Size optimization
作者简介
卞翔(1988-),男,博士,讲师,研究方向为结构优化设计,E-mail:xbian3@126.com。
