正面碰撞安全气囊点火时刻的研究  

Study on Airbag Optimal Ignition Time in Frontal Impact

作　　者：田钰楠 郝琪 毛怡 刘宇 TIAN Yu′nan;HAO Qi;MAO Yi;LIU Yu(School of Automotive Engineering, Hubei University of Automotive Technology, Shiyan 442002, Hubei, China)

机构地区：[1]湖北汽车工业学院汽车工程学院,湖北十堰442002

出　　处：《机械科学与技术》2022年第2期295-299,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(11502075);湖北省重点实验室创新基金项目(2015XTZX0418)。

摘　　要：以安全气囊点火时刻为研究对象,根据乘员碰撞能量守恒及T_(5in)-30 ms原则,推导出正面碰撞下安全气囊最佳点火时刻的计算公式,利用小型纯电动汽车的碰撞试验参数计算安全气囊的点火时间。建立驾驶员约束系统有限元模型,讨论气囊点火时刻对乘员损伤的影响趋势,最后用乘员加权伤害准则WIC稳定的最低范围确定最佳气囊点火时刻。结果表明,公式计算出的安全气囊点火时刻与仿真结果得到最佳点火时刻一致并且乘员伤害值符合要求,验证了安全气囊点火时刻公式的准确性。Taking the airbag ignition time as the object of study,deriving the formula for calculating optimal ignition time of an airbag in a frontal collision based on the conservation of occupant crash energy and the T_(5in)-30 ms principle,crash test parameters of small electric vehicles were used to calculate the ignition time of airbags.A finite element model of the driver restraint system was developed and the effect trend of airbag ignition time on occupant injury was discussed.Finally,the lowest range of the occupant-weighted injury guideline WIC stability was used to determine the optimal airbag ignition time.The results show that the airbag ignition time calculated by the formula is consistent with the best ignition time obtained from the simulation results,and the occupant damage value meets relative regulations,which verifies the accuracy of the airbag ignition moment formula.

关 键 词：正面碰撞 安全气囊 点火时刻 乘员伤害 

分 类 号：U491.61[交通运输工程—交通运输规划与管理]