摘 要：为实现汽车白车身的轻量化设计，本文提出一种基于多工况联合仿真的优化方法，并以某MPV车型为例进行仿真及验证。通过构建Kriging响应面模型，结合帕累托前沿曲线修正非线性误差，对白车身钣金料厚参数进行优化。优化结果显示，白车身质量减小9.8kg，各项性能指标均满足目标要求。仿真与试验验证表明，优化结果的误差控制在允许范围内，证明了该方法的有效性和工程适用性，从而为白车身结构优化提供了一种兼顾轻量化与多性能平衡的高效解决方案。
关键词：白车身；轻量化；联合仿真；Kriging模型；帕累托前沿曲线；多工况优化
中图分类号：U463.82 文献标志码：A DOI：10.15917/j.cnki.1006-3331.2026.02.006
Cosimulation Analysis and Optimization of an MPV Body-in-white Under Multiple Load Cases
ZHANG Biao,TONG Baofeng,YUAN Xiayi
Abstract: Automotive body-in-white,this paper proposes an optimization method based on multi-condition co-simulation.It conducts simulation and verification using a specific MPV model as an example.By constructing a Kriging response surface model and correcting nonlinear errors with the Pareto front curve,the study optimizes the sheet metal thickness parameters of the BIW.The optimization results show that the BIW successfully reduces weight by 9.8kg,with all performance indicators meeting the target requirements.Simulation and experimental verification demonstrate that the error of the optimization results is controlled within an acceptable range,proving the method's effectiveness and engineering applicability.Thus,it provides an efficient solution for BIW structural optimization that balances lightweighting with multi-performance requirements.
Key words: body-in-white; lightweighting; co-simulation;Kriging model; Pareto frontier curve; multi-working condition optimization
