起爆方式对柱形炸药空爆冲击波场的影响

Influences of Initiation Modes on Air Blast Wave Fields Produced by Cylindrical Explosives

为研究起爆方式对柱形炸药爆炸能量输出的控制效应,运用AUTODYN软件对不同起爆方式作用下的炸药在空气中爆炸过程进行了模拟。通过对比分析参考位置的冲击波超压峰值,得到了起爆方式对爆炸冲击波场分布的影响规律。研究结果表明:比例距离小于5 m·kg-1/3时,起爆方式可改变爆炸冲击波场的局部分布形态,其在不同的方向和距离对冲击波超压影响存在差异;比例距离大于5 m·kg-1/3时,起爆方式对冲击波场分布基本无影响;柱形炸药长径比一定的条件下,同一起爆方式作用下的爆炸相似律仍然成立。

To study the control effects of initiation modes on explosion energy output of cylindrical explosive,the air explosion process of explosives with different initiation modes were simulated by AUTODYN program. The effect rules of initiation modes on the blast wave fields were obtained by comparative analysis of blast wave peak over-pressure at different observation positions. The results indicate that the local distribution configurations of the blast wave fields within 5 m · kg^-1/3 scale distance can be changed by initiation modes. The effects of initiation modes on the blast wave peak over-pressure have differences in different directions and distances. The initiation modes have almost no influence on the over pressure of shock wave if the scale distance is greater than 5 m · kg^-1/3. When the length- diameter ratio of explosives are constant, blast wave field under action of the same initiation mode conforms to the similar law of blasting.