Pilot Study on Reaction Propagation in Explosive under Low Amplitude Shock
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摘要: 采用PVDF压力计和高速分幅摄影技术，对低冲击作用(2~4 GPa)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。Abstract: The physical processes, including input and output pressures of explosive, reaction zone propagation 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 thickness 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 questions are discussed such as the relation of shock increase and power ability and the effect of confinement on reaction increase and leak.
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Key words:
- explosive safety /
- low impact /
- reaction propagation
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图 1 传爆药与衰减层分界面处冲击波参数图解
Figure 1. Shock parameter scheme in the interface of booster and attenuator
图 6 冲击引发的反应区域传播的典型图像
Figure 6. Typical images of reaction zone propagation caused by shock
图 8 炸药化学反应对压力衰减的贡献
Figure 8. Contribution of explosive reaction to the pressure attenuation
表 1 炸药及衰减层参数
Table 1. Parameters of charge and attenuator
Material ρ0/(g/cm3) c0/(km/s) λ RHT-901 1.68 2.71 1.86 JO-9159 1.86 2.89 1.94 Steel 7.90 4.57 1.49 
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表 2 实验测得的输入压力和输出压力
Table 2. Input and output pressures tested by experiments
Exp.No. pin/(GPa) pout/(GPa) 1 2.9 0.15 2 3.7 1.24 3 3.2 ─
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