关键词: 白车身；多目标优化方法；有限元分析；灵敏度分析；最优解集；Pareto 前沿；Isight 软件

Abstract: Body in white (BIW) is an important part of vehicle, which plays the most direct role in protecting the safety of drivers and passengers, and its basic performance is particularly important. However, there are often conflicts between the performances, and the improvement of one performance often has a negative effect on some other performance. In order to better balance some performance in the design process of automobile body and find design parameters that match the target performance of the design model better, this paper takes the BIW of a small pure electric vehicle as an example to analyze its performance through finite element method simulation, and then uses Isight software to collect data and build models to find multi-objective solutions for designers to select design parameters that meet the design goals and have the best performance possible, and the design method of this paper has a certain reference significance for BIW parameter design.

Key words: Body in white; Multi-objective optimization; Finite element analysis; Sensitivity analysis;Optimal solution set; Pareto frontier; Isight software