受热炸药的冲击起爆特征

设计了炸药驱动飞片起爆受热炸药的实验装置，该装置既能够对实验炸药进行均匀地加热，又能够避免高温对加载炸药的影响。利用设计的实验装置对PBXC10炸药（HMX/TATB复合炸药）进行了14、100、140、160和180 ℃等5种不同加热温度下的冲击起爆实验，测量了该炸药内部压力的成长历程。采用点火增长反应速率方程对PBXC10炸药冲击起爆进行了数值模拟。根据实验结果，标定了不同温度下PBXC10炸药的点火增长模型参数，并给出了模型参数随温度变化的关系式，获得了不同温度下炸药的Pop关系。研究结果表明:PBXC10炸药的冲击波感度随温度的升高而升高，但与HMX炸药相比，其冲击波感度对温度的敏感性明显降低，这是因为PBXC10炸药中的TATB具有较好的降感作用。

On shock initiation of heated explosives

An experimental device with an explosive-driven flyer plate was designed for shock initiation of the explosives at elevated temperatures. This device can heat up the acceptor explosives uniformly and keep the donor explosives out of the heating. Based on this device, the shock initiation tests were conducted for the HMX/TATB composite explosive heated to different temperatures: 14, 100, 140, 160 as well as 180 ℃, and the in-situ pressure histories were measured at various depths of the explosives. The ignition and growth reaction rate equation was used to numerically simulate the shock initiation of the explosive. Based on the experimental results, the parameters were determined for the  ignition and growth reaction rate equation of the explosive shock initiation at different temperatures, the relationships were given between the model parameters and temperature, and the Pop relationships of the explosive at different temperatures were given. The results show that the shock sensitivity of the HMX/TATB composite explosive increases with an increase in the temperature, but its dependence on temperature is less than that of the HMX explosive in that the TATB explosive in the composite explosive has good desensitizing effect.