汽车爆炸的超压分布规律实验研究

测试了不同药量和不同车型的爆炸超压值,对汽车爆炸的超压分布规律进行了实验研究.结果表明,小汽车内发生炸药爆炸时,车门侧压力明显大于车尾部方向的压力,车外的冲击波超压值要大于空气中炸药爆炸的结果,前者约为后者的1.0～2.2倍.即车体对冲击波约束作用要小于车内底盘的反射作用.计算得到了实验中冲击波超压对人员的杀伤半径和最小安全距离,对汽车爆炸案件具有一定指导作用.冲击波的反射不可忽视,货车下地面炸药爆炸表现出明显的冲击波反射作用,测得超压值大于空气中爆炸的超压值.

Research on monitoring overpressure of car bombs

This paper aims to introduce the authors' research on the regularity of the overpressure distribution when a vehicle is exploded. In our experimental tests, we have tested the value of the overpressure produced by different amounts of explosives both in or out of a vehicle. The testing system consists of piezoelectricity-pressure transducer, DHF-4 charge amplifier, TEK TDS654C oscillograph and high impedance coaxial-cable. The experimental results show that, when vehicles are exploded, the overpressure would soon be getting attenuated quickly with the pressure near the doors being evidently higher than at the back of the car, the experiments also prove that overpressure outside the vehicles is also relatively higher than that in the open air. With the former being about 1.0-2.2 times higher than the latter,which proves that the reflection of shock wave is actually more evident than the restriction effect. On the basis of data analysis, we have discovered from the experiment the damage radius for human being and the least safety distance of shock wave to human body, which can be taken as a reference to dealing with car-blast accidents. At the same time, the reflection of blast wave cannot be neglected, which can be seen from the truck's test, the overpressure is also proved higher than explosive exploded in free air.