Abstract:

Airbag system matched to vehicle for only one load case can not provide effective protection for the occupants on other load cases, sometimes it would probably injure occupants on the contrary. Taking a domestic sedan for example, a mathematic model of its frontal occupant restraint system was built based on MADYMO,the dynamic simulation was performed, and the parameters of the occupant restraint system were optimized by considering four frontal rigid-barrier impacts load cases according to FMVSS208.Finally,a method of occupant restraint system optimization based on multiple load-cases is concluded under keeping components configuration fixedness.

Key words: frontal impact;occupant restraint system;multiple load case;optimization

摘要：

针对单一工况匹配的安全气囊系统不仅在其他工况下不能保证对乘员的保护效能，而且还极有可能产生更大的伤害。以国产某轿车为例，建立该车的前排乘员侧约束系统的数学仿真模型，针对美国FMVSS208法规所要求的正面刚性固定壁障垂直碰撞的四种工况进行乘员响应的仿真计算，并对该车的约束系统参数进行多工况优化，同时提出了基于多工况的乘员约束系统参数优化方法。所提方法能够使乘员约束系统在不增加配置的基础上，满足更多种工况下的假人伤害值要求。

关键词: 汽车碰撞；乘员约束系统；多工况；优化