摘要
汽车被动安全开发中,一般通过设置薄壁梁吸能结构的强度梯度来满足不同程度的碰撞工况下吸能要求。而充分且稳定的变形,将有利于提高结构吸能效率以及保证较好的维修经济性。以中大型乘用车前端结构在正面碰撞工况下合理的吸能占比作为设计目标值,借助理论计算和有限元仿真分析确定初步设计方案,并在此基础上进行结构间刚度匹配性优化设计。研究结果表明:基于吸能目标的汽车前端结构刚度匹配性设计方法,在满足吸能要求的同时,其结构间的刚度匹配性较好,在不同程度的碰撞工况下,都能按照理想的模式发生变形,满足设计要求。
In the development of vehicle passive safety,the energy gradient of the thin-walled beam energy absorbing structure is usually adopted to satisfy the energy absorption requirements under different collision conditions. Sufficient and stable deformation will help to improve energy absorption efficiency of the structure and ensure good maintenance economy. The reasonable energy absorption was considered as the design target for the frontal structure of medium and large passenger cars in frontal crash condition,by means of theoretical calculation and finite element simulation analysis, the preliminary design scheme was determined and the optimum design of structural stiffness matching was carried out on the basis of that.The results show that the stiffness matching method of the front end of the vehicle based on the energy absorbing target can meet the requirement of energy absorption, and the stiffness matching between the structures is better;under different conditions of collision, it can deform according to the ideal mode and meet the design requirements.
作者
胡召阔
成思源
张雷
HU Zhaokuo;CHENG Siyuan;ZHANG Lei(Faculty of Electromechanical Engineering, Guangdong University of Technology,Guangzhou Guangdong510006, China;Integrated Security Technology Department,Automotive Engineering Institute,Guangzhou Automobile Group Co., Ltd.,Guangzhou Guangdong 510640,China)
出处
《机床与液压》
北大核心
2019年第9期166-170,共5页
Machine Tool & Hydraulics
关键词
汽车正面碰撞
前端吸能结构
吸能目标
刚度匹配
Vehicle frontal crash
Front energy absorbing structure
Energy absorbing target
Stiffness matching
