退役单基药的冲击起爆特性

为了研究退役单基药的冲击起爆特性，参照GJB772A-97中卡片式隔板法实验方法，分别开展了退役单基药的连续爆速实验、冲击波感度实验及锰铜压力计实验，观测了其冲击起爆的爆轰建立过程，得到了临界隔板值以及临界起爆压力。在连续爆速实验中，隔板厚度为50 mm时，观察到了退役单基药反应冲击波不断增长的过程，并在90mm处转变为爆轰; 在冲击波感度以及锰铜压力计实验中，测得其临界隔板厚度为50~52 mm，临界起爆压力为1.35~1.49 GPa。对退役单基药的冲击起爆过程进行了数值模拟，结合三种实验的实验结果，标定了其点火增长模型反应速率方程参数。

Shock initiation characteristics of expired single-base propellants

The continuous detonation velocity test, the shock wave sensitivity test and the critical initiation pressure testwere developed, respectively, with reference to the GJB772A-97 card gap test.Based on the above tests, the detonation establishment process in the expired single-base propellantwas investigated, and the critical gap thickness and the critical initiation pressure were obtained.In the continuous detonation velocity test, the building-up process of the reactive shock wave was observed at the PMMA gap thickness of 50 mm and itdeveloped into a normal detonation at the PMMA gap thickness of90mm.The critical gap thicknesswas 50-52 mm obtained from the shock wave sensitivity test.And the critical initiation pressure was1.35-1.49 GPa obtained from the critical initiation pressure test.According to the above tests, the numerical simulations were conducted to calibrate the parameters of the reactive rate equation in the ignition-and-growth model for the expired single-base propellant.