白车身轻量化优化研究  

Research on lightweight optimization of the white vehicle body

作　　者：丁艺 张兰春[1] DING Yi;ZHANG Lanchun(School of Automotive and Transportation Engineering,Jiangsu University of Technology,Changzhou 213000,China)

机构地区：[1]江苏理工学院汽车与交通工程学院,江苏常州213000

出　　处：《江苏理工学院学报》2024年第2期41-50,共10页Journal of Jiangsu University of Technology

基　　金：江苏省高校自然科学基金重大项目“混合动力双带式全电调节CVT传动效率优化及匹配控制策略研究”(22KJA580002)。

摘　　要：对汽车白车身进行结构分析和优化,可在保证强度和安全性能的基础上,减少车身重量,提升整车经济性。基于ANSA软件,针对某SUV白车身进行轻量化设计与优化。首先,建立白车身几何模型,并获取材料属性,采用ANSA进行结构分析,评估车身结构的弯曲刚度及扭转刚度;然后,通过单目标优化方法,考虑最小质量、应力约束和模态频率限制等约束条件,对车身进行优化设计,实现轻量化目标。结果表明:优化后车身重量减少了28kg,减重比例达到了3.7%;车身的弯曲刚度和扭转刚度在满足设计标准以及模态的约束条件下有所降低,分别降低了2.5%和6.8%;且车身仍保持足够的强度和安全性能。The structural analysis and optimization of the white vehicle body can reduce the weight of the body and improve the economy of the whole vehicle while maintaining the strength and safety performance.Based on ANSA software,lightweight design and optimization for an SUV body in white are carried out.Firstly,the geomet-ric model of the white body is established,and the material properties are obtained.ANSA is used for structural analysis to evaluate the bending stiffness and torsional stiffness of the body structure.Then,through the single objective optimization method,considering the constraints of minimum mass,stress constraint and modal fre-quency constraint,the vehicle body is optimized to achieve the lightweight goal.The results show that the body weight is reduced by 28 kg after optimization,and the weight reduction ratio reaches 3.7%.Under the design standard and modal constraint conditions,the bending stiffness and torsional rigidity of the vehicle body decrease by 2.5%and 6.8%,respectively.Also,the body still maintains sufficient strength and safety performance.

关 键 词：白车身 ANSA 刚度 轻量化 

分 类 号：TH128[机械工程—机械设计及理论]