超压爆轰产物冲击绝热线的实验研究

Experiment Research on the Hugoniot of JB-9014 Explosive Over-Driven Detonation Product

炸药驱动高速飞片撞击基板和炸药,从而在炸药中产生超压爆轰状态。利用高速扫描相机测试了冲击波在炸药试样和铝标准试样中的传播速度,采用对比法得到了炸药爆轰产物的雨贡纽曲线。通过分析发现,通常的冲击波-粒子速度(D-u)关系式的线性拟合不适合CJ点附近的雨贡纽数据,对于炸药爆轰产物的冲击波-粒子速度关系式最好采用非线性关系式。利用冲击波前后物理量守恒关系式,将D-u数据转化为p-V数据,拟合得到了炸药爆轰产物的雨贡纽p-V关系。

Over-driven detonation is achieved by high speed flyer impacting, which is driven by explosive. The time when the shock wave passes through the samples is detected. Using ＂the impedance matching method＂ , the Hugoniot of the product of the JB-9014 explosive can be obtained. It is shown that the simple D-u equation can not fit the Hugoniot data well. With relation to the explosive,it is better to use quadratic in D-u equation. Using conservation relations of physical variable before and after the shock wave,the D-u data can be translated to p-V data. Then the p-V equation can be obtained by fitting the p-V data.