加热前后PBX-2炸药的撞击响应

Impact Response of Unheated and Heated PBX-2 Explosive

为了研究炸药在加热前后撞击安全性能的变化,设计了热与撞击复合加载试验系统,并对Φ50 mm×50 mmPBX-2药柱进行了试验。试验中采用热电偶测量药柱不同位置温度的变化过程,通过高速摄像照片记录了点火反应过程,用冲击波超压传感器测量了炸药的反应超压,初步获得了加热前后PBX-2炸药的撞击响应特性。结果表明,加热后的PBX-2炸药撞击反应速度阈值明显降低;建立的热与撞击复合试验方法,为评估炸药在异常环境下的安全性能提供了一种新的技术途径。

In order to study impact safety of unheated and heated P13X-2 explosives, the test system of heat and projectile impacting mulitiple was designed. The muhiple tests utilized Φ50 mm × 50 mm PBX-2 explosive as the test samples, the temperature at different positions was tested by thermocouples. Ignition reaction process was analyzed by high-speed motion pictures. The reaction overpressure of explosive was gained by shockwave overpressure gauges. The impact response characteristics for PBX 2 explosive were gained initially for unheated and heated PBX-2 ex plosives. The results show that impact reaction threshold velocity for heated PBX 2 decreased more significantly than unheated PBX 2 explosive. This heat and dynamic loading combined test methods establisted can provide a new way to assess the explosives safety under abnormal environment.