射流对工业炸药的引爆及侵彻机制

MECHANISM OF JET INITIATION AND PENETRATION OF COMMERCIAL EXPLOSIVES

本文用脉冲X光摄影技术及电探极-记录仪系统,对射流引爆及侵彻工业炸药的过程进行了观测,探讨了的流引爆及侵彻工业炸药的机制,给出了射流与工业炸药作用过程的物理图象。

The interaction of shaped charge jet and explosives has been studied since thesixties for military applications and safety considerations. It has been proved that the metal jet produced by a shaped charge is a powerful tool to initiate the military high explosives. The mechanism of jet initiation and the criteria for, maintaining a propagating initiation were reported.In this work. jet initiation of two commercial explosives ANFO and Rock No.2 (a mixture of 85% AN. 11% TNT and 4% wood flour) has been studied. X-ray flash photograph, multiple electric sensor system are used for diagnosis and data acquisition. The jet is produced by a shaped charge used for oil drilling with a copper liner of 60 degree co.ne angle and a standoff of 40mm.The characteristics of the copper jet have been studied in detail. The distribution of particle velocity, mass and energy along the jet at some instants were determined. The process of jet penetration and initiation were studied and the physical picture of the process is given. It is clear that the jet impact on the explosive is strong enough to induce detonation in ANFO and Rock No.2.