Study on Airbag Optimal Ignition Time in Frontal Impact
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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T5in-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。Abstract: 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 T5in-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.
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Key words:
- frontal impact /
- airbag /
- ignition time /
- occupant injury
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表 1 安全气囊的材料性能参数
部件名称 弹性模量/
MPa泊松比 密度/
(kg·mm-3)厚度/
mm气囊织物 300 0.2 8.76×10-7 0.38 排气孔 30 0.2 8.76×10-7 0.38 
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