亚微米炸药的冲击波起爆研究

采用小隔板试验（低压长脉冲）和冲击片（高压短脉冲）试验对亚微米粉体炸药的起爆感度进行了对比试验研究,发现亚微米粉体炸药具有在常见环境力（低压长脉冲）作用下安全钝感,而在特定激励（高压短脉冲）作用下敏感的特点.研究表明,在90%理论密度试验条件下,低压长脉冲冲击波起爆过程中,冲击波感度由热点点火过程控制,且随粒度的减小而降低;而高压短脉冲冲击波起爆过程中,炸药起爆感度由爆轰成长过程控制,冲击波感度随粒度的减小而提高.

Selectivity of Sub-micron Explosive Sensitivity to Shock Wave

The shock sensitivity of sub-micron explosive was studied by small-scale gap test and slapper initiation test; and the shock wave was low pressure-long pulse in the small-scale gap test,and high pressure-burst pulse in the slapper initiation test. The explosive is safe when motivated by a generic environmental force,i, e. low pressure-long pulse and it is sensitive when motivated by special environmental force ,i. e. high pressure-burst pulse. Moreover, the shock sensitivity decreases with the reduction of explosive particle size when ignition is a dominant process in the course of shock wave initiation; but oppositely ,the shock sensitivity increases when detonation buildup is dominant.