Abstract: As the competition in the automobile market is increasingly intensifying, body design is facing severe challenges. In the early design of the body structure platform, it is necessary to consider the body collision, noise, vibration, harshness (NVH) and strength fatigue performance of different models of the platform. With the increasing difficulty of crashworthiness design of body structure, the weight of body increases, and the balance between performance and lightweight design of structure becomes more difficult. In order to cope with the challenges of body development, this paper studies the multi-disciplinary optimization technology of body structure performance, which runs through the simulation optimization drive design in the conceptual design stage of body structure performance integration. It can quickly achieve the performance standard under the premise of minimum weight increase. Based on the model development case of a sport utility vehicle (SUV), the feasibility of this technology is explained, which provides a reference for the later body development.

Key words: Body design; Performance design; Optimize process; Topological optimization; Section and joint optimization; Parametric model optimization; Multidisciplinary optimization

摘要： 汽车市场竞争日渐加剧，车身设计面临严峻挑战。在前期的车身结构平台设计时，需 要同时考虑平台不同车型的车身碰撞，噪声、振动与声振粗糙度（NVH）以及强度疲劳性能 设计。随着车身结构耐撞性设计难度加大，车身重量随之增加，性能和结构轻量化设计平衡 难度加大。为了应对车身开发的种种挑战，文章研究基于车身结构性能多学科优化技术，在 车身概念设计阶段贯穿仿真优化驱动设计的理念即结构性能一体化，快速实现重量增加最小 前提下的性能指标，基于某运动型多功能车（SUV）的车型开发案例诠释了此技术的可行性, 为后期的车身开发提供参考。

关键词: 车身设计；性能设计；优化流程；拓扑优化；断面和接头优化；参数化模型优化； 多学科优化