凝聚炸药的短脉冲冲击起爆

本文介绍了利用电炮研究两种凝聚炸药（TNT/RDX=35/65和PBH-9）的短脉冲冲击起爆的实验结果。炸药样品为直径20mm,长度分别为3.0、5.0、10.0mm的圆柱及楔形药块。在所研究的实验条件下,当药柱长度大于5.0mm时,两种炸药的起爆判据可用p?=常数描述。当药柱长度小于3.0mm时,撞击飞片的阈值速度明显增加。我们还观测了飞片直径对起爆阈值速度的影响,用楔形药块观测了不同加载条件下的到爆轰时间和距离。

SHORT DURATION SHOCK INITIATION OF CONDENSED EXPLOSIVES

The experimental results carried out by electric-gun facility for the short duration shock initiation behaviors of two kinds of explosives (TNT/RDX= 35/65 and PBH-9)are described in this paper. The explosive samples to be tested are 20mm in diameter and 3mm, 5mm and 10mm,respectively,in thickness, and in some cases are wedged in shape. It showed that the initiation criterion pr= constant is suitable to the both explosives provided the length of the explosive charge is longer than 5mm,and the threshold impacting velocity of the flyer increases significantly as the length of the explosive change becomes shorter than 3mm. The flyer diameter dependence on the threshold impacting velocity and the relation between the distance and the time to detonation for wedged charge under different loading conditions were also observed.