Side impact accident of the car is next to front impact , which occupies about 30 percent of accident total in the forms of collision of front impact , side impact , rear impact and roll , and occupies about 35 percent in the accident of death and serious injury 在正碰、侧碰、追尾、翻滚这些碰撞形式中,汽车侧面碰撞事故约占事故总数的30 % ,仅次于正面碰撞,而在造成死亡和重伤的事故中,侧碰事故约占35 % 。
The research on side rigidity during “ first impact ” is hoped to have an introductory effect to a certain extent , founds new fields of side impact research , widens our thinking of concept design phase in side impact , and ensures safety of side impact of the car better 对“一次碰撞”过程中汽车侧面刚性的研究,是希望在一定程度上起到抛砖引玉的作用,从而建立侧面碰撞研究的新领域,拓宽侧面碰撞概念设计阶段的思路,更好地保障汽车的侧面碰撞安全性。
The comparison between simulation result for complete vehicle with modified b - pillar and that for original one shows that the crash simulation is a feasible way to ensure a newly designed vehicle having good crashworthiness and the structural optimization by fea is an effective method to provide valuable idea for conceptual design of structures 由改进前后的整车侧面碰撞仿真计算结果对比表明，部件的碰撞仿真设计是确保设计车辆具有良好碰撞性能的一种重要的方法和手段，应用有限元法进行结构优化设计是一种有效的方法。
On the basic of a great of literature reading and research on safety of side impact of the car , according to requirement of ece r95 , applied madymo6 . 2 . 1 software , established simulation model of side impact of the car , researched the relationship between side rigidity of the car and passenger injury in side impact , which showed that during first impact the bigger side rigidity was , the more advantaged protection for the car and passenger in a definite range , and which drew a conclusion that the most serious part of passenger injury was pelvis during first impact . then detailed the substructure model by defining bodies , joints , contact types and contact characteristic , researched some improvement approach for side safety of the car , and then analyses a particular case , that was to say to fix vehicle door bar fender on between inner and outer plate of the vehicle door , analyzed the influence of passenger injury when the bar fender was fixed on different position , the result showed that the passenger injury was less when the bar fender was fixed on the height of vehicle door decorate bar . finally , a set of tests were performed , contrasting the simulation result with the test , analyzed the influence of the side rigidity of the car to passenger injury , which showed the test 本文在对汽车的侧面碰撞安全性进行大量文献阅读和研究的基础上,按照欧洲ecer95侧面碰撞乘员保护法规的要求,应用多刚体动力学软件madymo6 . 2 . 1 ,建立了汽车的侧面碰撞仿真模型,研究了汽车的侧面刚性对乘员损伤的影响,结果表明在“一次碰撞”中,在一定范围内汽车侧面刚性越大,越有利于汽车和乘员的保护,同时得出结论,即在“一次碰撞”过程中人体损伤最严重的部位是骨盆;然后通过定义各刚体、铰链、接触类型以及接触特性,对该模型进行子结构细化工作,研究了加强汽车侧面安全性的若干改进措施,并进行了一个特例分析,即在此模型的车门内外板之间安装了车门防撞杆,分析了当车门防撞杆安装在不同位置时对乘员损伤的影响,结果表明防撞杆位于车门装饰条的高度时,对乘员的损伤较小;最后进行了一组侧面碰撞试验,通过试验和仿真结果的对比,分析汽车的侧面刚性对乘员损伤的影响,表明试验和仿真结果是一致的,从而证明了仿真模型的有效性以及仿真结果的正确性。
