水下爆炸冲击波相互作用的仿真分析

Study on the Shock Waves Interaction of Underwater Explosions

为了研究两发炸药水下爆炸冲击波之间的相互作用,利用AUTODYN仿真软件,计算了同时起爆和延时起爆两种情况下两发炸药水下爆炸冲击波峰值压力,并与单发炸药水下爆炸冲击波进行对比。通过分析峰值压力和冲击波到达延时,得出结论:两发炸药同时起爆的情况下,炸药爆炸产生的气泡会对临近炸药的爆炸冲击波产生衰减作用;两发炸药延时起爆且不会引起殉爆的情况下,在距先起爆炸药较近处,先起爆炸药产生的气泡会对后起爆炸药的冲击波产生衰减作用,并且使冲击波的传播速度变慢;在距后起爆炸药较近处,后起爆炸药的爆炸会对先起爆炸药的冲击波产生增强的作用,并且使冲击波的传播速度变快。所得结论为提高水下爆炸威力提供一定的理论参考。

In order to study the interaction of shock wave generated by underwater explosions, the peak pressures of shock wave generated by two explosives with different detonation delay were calculated, by the simulation software AUTODYN, and conclusions are obtained after analysis of peak pressure and arrival delay. It showed that when both explosives detonated at the same time, the bubble would attenuate the shock wave generated by another explosive. When both explosive didn＇t detonated at the same time, and the sympathetic detonation didn＇t happen, at the place closer to the explosive detonated earlier, the bubble generated by the explosive detonated earlier would attenuate the shock wave generated by another explosive, and decelerate the propagation speed; at the place closer to the explosive detonated later, the explosive detonated later would strengthen the shock wave generated by another explosive, and accelerate the propagation speed. The conclusions could provide theory basis for improvement of underwater explosion power.