Method to determine the explosion power of an automobile airbag
CHEN Wuzheng1,2,CHEN Dapeng2,CHEN Li2,FANG Qin2
1.Shanghai Communications Water Transportation Design and Research Co., Ltd., Shanghai 200092,China;
2.State Key-Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210014,China
Abstract:An airbag is a passive protection system for automobiles, in which chemical substance was filled.It can be detonated when the vehicle collision accident takes place, and a large amount of gas would be released simultaneously.However, unexpected accidental explosions often take place in the process of manufacturing, transporting, storing, and using of airbags, resulting in casualties and destruction of facilities.To calculate the explosion power of automobile airbags accurately, a theoretical calculation method was proposed to determine the TNT equivalence of a typical vehicle airbag, on the basis of the chemical composition of a typical gas generator and the similarity theory of the explosion heat energy.By virtue of the three explosion reaction equations of airbags, the TNT equivalence of typical airbags were determined to be 33.6 g, 37.3 g and 31.6 g respectively, and the average TNT equivalence was 33.8 g.An equivalent FE model for airbag explosion was also developed in the LS-DYNA.The reliability and accuracy of the proposed theoretical calculation method was verified by comparing the results of FE model with the existing test results of airbag explosion.
陈武争1, 2,陈大鹏2,陈力2,方秦2. 汽车安全气囊爆炸威力的确定方法[J]. 振动与冲击, 2020, 39(2): 163-168.
CHEN Wuzheng1,2,CHEN Dapeng2,CHEN Li2,FANG Qin2. Method to determine the explosion power of an automobile airbag. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(2): 163-168.
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