多元炸药装药冲击起爆的数值模拟

Numerical simulation of shock initiation in multivariate explosive charge

对多元炸药装药的冲击起爆过程进行了数值模拟研究,得到了改变炸药装药层叠顺序后的压力时程曲线.通过分析比较发现:当起爆过程从高爆速炸药传入低爆速炸药时,压力波形过渡平稳,在低爆速炸药到达CJ点时会出现短暂的超压爆轰现象;当起爆过程从低爆速炸药传入高爆速炸药时,会出现回爆现象,压力波形出现双峰,这对于被驱动系统的二次加载是有价值的.

The shock initiation of multivariate explosive charges is investigated by numerical simulation. The time-histories of pressure are obtained through changing the installation order of charges. It seems from the anal- ysis that ： when the process of shock initiation goes from the high-speed explosive to the low, the pressure wave- form transition is smooth, and when the low-speed explosive reaches its C-J point there will be the short over- pressure detonation, when the process of shock initiation goes from the low-speed explosive to the high, the reto- nation phenomenon will appear, the pressure waveform has two peaks, and that is valuable to the twice-loading of the charge system.