HMX含量对PBT基推进剂撞击感度和非冲击点火反应特性的影响

Influences of HMX Content on the Impact Sensitivity and Non-Shock Initiation Reaction Characteristics of PBT Based Propellants

为了研究HMX的含量对PBT基推进剂撞击感度和非冲击点火反应特性的影响,开展了BAM落锤撞击感度试验、脆性试验和Susan试验。结果表明:随着HMX含量的增加,PBT基推进剂爆炸概率为50%时的特性落高(H50)减小,即推进剂的撞击感度随着HMX含量的增加而增大。对于HMX的质量分数分别为0、5%、10%和15%的PBT基推进剂,其临界撞击点火速度分别为168、147、136、131 m/s,临界撞击点火速度随HMX含量的增加而减小;在撞击速度为120~300 m/s的非冲击作用下,4种PBT基推进剂的反应等级为爆炸或部分爆轰,相同撞击速度下,HMX的质量分数为10%的PBT基推进剂相较于其他3种PBT基推进剂具有更剧烈的反应等级。

In order to investigate the effect of HMX content on the impact sensitivity and non-shock initiation reaction characteristics of PBT based propellants,BAM impact sensitivity tests,friability tests and Susan tests were carried out.The experimental results show that with the increase of HMX content,the characteristic drop height of PBT based propellants at 50%explosion probability(H50)decreases,indicating that the impact sensitivity increases with higher HMX content.In friability tests,the critical non-shock initiation velocities for the PBT based propellants with the HMX mass fraction of 0,5%,10%,and 15% are 168,147,136,and 131 m/s,respectively,showing a decline in the critical non-shock initiation velocity as HMX content rises.In Susan tests,four different kinds of PBT based propellants react as explosion or partial detonation at velocities range of 120 m/s to 300 m/s.The PBT based propellant with the HMX mass fraction of 10% exhibits more intense reactions compared to the other three PBT based propellants at the same velocity.