高能炸药摩擦感度的数值模拟

为了研究炸药摩擦安全性，利用熔化摩擦模型对几种高能炸药的摩擦感度进行了数值模拟，结果符合实验，并根据热分解反应速率分析了感度规律。由于炸药熔点一般低于点火温度，所以基于一个考虑熔化现象的炸药摩擦模型，在炸药感度实验条件下进行了一维数值模拟，给出了炸药熔化结果和摩擦点火的时间:4种摩擦感度较弱的炸药包括DATB、NQ、TATB和TNT的点火时间的顺序即感度顺序符合实验结果，说明摩擦点火模型适应性。进一步结合炸药热分解反应速率的大小顺序，数值模拟证明，在一定摩擦强度下，点火顺序会发生交换，说明摩擦感度实验不能完全说明炸药摩擦感度强弱顺序。

Numerical simulation of friction sensitivity of high explosives

In order to study the explosive friction safety, a numerical simulation of high explosive friction sensitivity experiment was performed based on a melting friction model. The numerical results agree with the experiment results. The law of friction sensitivity was then analyzed based on the thermal decomposition rate. As the melting temperature is usually lower than the ignition temperature, a one-dimension numerical simulation of sensitivity experiment was conducted using a model that took account of melting, and the ignition times and melting results were obtained. The order of four explosives' ignition time including DATB, NQ, TATB and TNT meet agree with the experiment results, proving the applicability of the model. Furthermore, based on the order of the thermal decomposition rate, the numerical results have proved that, when the friction strength reaches certain degrees, the order of ignition time will change, which means that the sensitivity experiment cannot fully describe the order of the explosive sensitivity.