Abstract: This paper takes a 12 m hydrogen fuel coach of a company as the research object. Firstly, in accordance with the regulation on European coach rollover regulation ECE R66, a three-dimensional model of the vehicle is built. Then, by using HyperMesh software, a finite element analysis model of the vehicle is established, and the rollover simulation analysis is carried out in combination with LS-DYNA software. Then, from the simulation calculation results, we can see that the upper structure of the body has seriously intruded into the passenger survival space, which will cause damage to passengers. Finally, an intensive study on the strength performance optimization of the upper structure of the body is conducted. Multiple optimization design schemes are proposed and verified for the weak areas of the structure. A general and reliable optimization design scheme for improving the rollover performance of the large coach is proposed in this study, on the basis of ensuring that the strength of the upper structure of the vehicle meets the regulatory requirements.

Key words: hydrogen fuel coach; rollover; survival space; structure optimization

摘要： 文章以某司某型 12 m 氢燃料客车为研究对象，首先参照欧洲客车侧翻法规 ECE R66 要求，搭建整车三维数模，利用 HyperMesh 软件建立整车有限元分析模型，结合 LS-DYNA 软件进行侧翻仿真分析计算；从仿真计算结果可知，车身上部结构已严重侵入乘员生存空间， 会给乘客造成损伤；最后对车身上部结构强度性能优化进行深入研究，针对结构薄弱区域提 出多种优化设计方案，并进行验证。在保证车型上部结构强度满足法规要求的基础上，研究 为大型客车侧翻性能的提升提出通用可靠的优化设计方案。

关键词: 氢燃料客车；侧翻；生存空间；结构优化