低冲击作用下炸药中反应传播的初步研究

Pilot Study on Reaction Propagation in Explosive under Low Amplitude Shock

采用PVDF压力计和高速分幅摄影技术，对低冲击作用（2～4GPa）下入射到炸药中的压力和输出压力、冲击引发反应区域的传播等物理过程进行了测量，得到了不同衰减层厚度下炸药的入射压力历程和冲击传播图像。根据实验结果，分析了低冲击作用下压力增长或衰减及冲击引发反应区域的传播规律，并由此对冲击波阵面的压力与做功能力的关系、壳体约束对反应增长及压力泄露的影响等问题进行了进一步讨论。

The physical processes, including input and output pressures of explosive, reaction zone prop-agation caused by low amplitude shock, are tested by PVDF gauge and high-speed photography. The shock propagation image and the course of input pressure in explosive with different attenuator thick-ness are gained. According to the results, the law of pressure variation and characteristics of reaction zone propagation in explosive under low amplitude shock are analyzed. Furthermore, some safety ques-tions are discussed such as the relation of shock increase and power ability and the effect of confine-ment on reaction increase and leak.