常温附近温度变化对炸药冲击起爆特征的影响（英文）

Shock Initiation Characteristics of Explosives at Near-ambient Temperatures

为了研究常温附近温度变化对炸药冲击起爆特征的影响程度和规律,设计并建立了炸药局部加热和冷却装置,结合拉氏分析方法研究了HMX/TATB基复合高能炸药PBX-1和TATB基钝感高能炸药PBX-2在常温附近（5-75℃）的冲击起爆压力成长过程。基于实验结果,利用点火增长模型对两种炸药的冲击起爆过程进行了数值模拟。结果表明,随着温度升高（5-75℃）,炸药的冲击起爆压力成长过程均逐渐变快,到爆轰距离变短,点火增长模型中的反应速率参数G1变大,说明两种炸药随温度的升高对冲击变得更敏感,常温附近温度变化对炸药安全性的影响不能忽略。

To study the influence extent and law of near-ambient temperature changes on shock initiation characteristics of explosives, an experimental device with local heating and cooling to explosive was designed and established. Combined with Lagrangian analysis method, the growth process of shock initiation pressure at the near room temperature from 5 ℃ to 75 ℃ for two explosives （PBX-1 ： a HMX/TATB composite explosive; PBX-2 ： a TATB based IHE） was studied. Based on the experimental results, numerical simulation of the shock initiation process for two kinds of explosives was performed by the model of ignition growth. The results show that as temperature changing from 5 ℃to 75 ℃, the growth of shock-initiation pres- sure of two kinds of explosives is gradually changing fast, the run distance to detonation becomes shorter and the reaction rate parameter G1 in the ignition growth model becomes larger, indicating that the two explosives become more sensitive to shock as near-ambient temperature increasing, the effects of near-ambient temperature changes on safety of explosives can not be ignored.