模拟跌落撞击下PBX-2炸药的响应

Reaction of PBX-2 Explosive under Simulated Drop Impact

为了研究带壳体约束条件下炸药的跌落安全性,设计了模拟跌落试验装置。对Φ98 mm×39 mm PBX-2炸药进行了跌落试验,采用polyvinylidene fluoride(PVDF)计测试了样品中的压力变化过程,采用PCB加速度计获得了装置中不同位置的加速度变化过程,通过高速录像照片分析了点火反应过程,通过冲击波超压传感器测量了炸药的反应超压,获得了不同速度跌落下炸药的响应过程。结果表明,模拟跌落试验中PBX-2炸药的反应相对释放能约为35%,明显高于Spigot跌落试验;建立的模拟跌落试验方法,为评估炸药在异常环境下的安全性能提供了一条新的技术途径。

A device of simulating drop test was designed to study the safety drop of Φ98 mm×39 mm PBX-2 explosive under the shell confinement.The pressure change was measured by PVDF gauges.Acceleration change at two positions were obtained by PCB acceleration gauges.Ignition process was analyzed by high-speed motion pictures.The reaction overpressure was measured by blast pressure gauges.Reaction of explosive was obtained from different velocity fragment impacts.Results show that the relative release energy for PBX-2 explosive is about 35%,which is higher remarkedly than that in Spigot test,and the test established to simulate drop can provide a new means to evaluate explosive safety under the unexpected scenarios.