摘要
氢瓶碰撞安全问题是影响氢能源轿车耐撞性的一个重要因素。该文对于一款氢能源轿车的100%正面碰撞以及追尾碰撞进行了仿真,分析了氢瓶在碰撞中的冲击状态以及框架在冲击载荷条件下的挤压变形情况。通过载荷的静力等效,用有限元方法,在保证承载结构抗弯刚度的基础上,采用铝合金材料,并对框架进行结构优化设计。最后在整车碰撞中对改进的框架结构进行仿真验证。仿真结果显示:新的框架结构不仅提升了氢瓶的各安全评价指标,提高了整车的耐撞性,而且框架整体质量降低了27%,实现了框架的轻量化。
The safety design of the hydrogen bottles is an important factor in hydrogen energy vehicle crashworthiness.The frontal impact and the rear impact of a hydrogen vehicle were simulated to investigate the deformation states of a hydrogen bottle framework.The equivalent static forces of impact loads were adopted in the new bottle frame structural optimization process.The material of new frame utilized aluminium alloy and satisfied the bending requirements of different load cases.Then safety of the new frame structure was validated in whole vehicle crashworthiness simulations.The results show that the performances of the new framework improved the vehicle impact safety,and the total mass of the frame is reduced by 27% to realize lightweight structure design.
出处
《汽车安全与节能学报》
CAS
2010年第3期205-209,共5页
Journal of Automotive Safety and Energy
基金
上海市科学技术委员会科研计划项目(08ZD1150303)
关键词
氢能汽车
防撞设计
正面碰撞
追尾碰撞
氢瓶框架
结构轻量化
hydrogen vehicle
crashworthiness design
frontal impact
rear impact
hydrogen bottle frame
structure design
lightweight structure
