Research on Drop Hammer Impact Sensitivity of RDX Powder Explosive in Extreme Low Temperature Environment
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摘要:为研究环三亚甲基三硝胺（RDX）在低温环境下的撞击敏感性，设计了低温环境下的可视化落锤试验装置，研究了RDX粉末炸药在低温环境、不同落锤高度下的力-化学响应特征及相应的点火概率，并进行点火机理分析。研究结果表明：RDX粉末炸药的点火概率随环境温度的降低而降低，在-50℃和-100℃时，RDX粉末炸药很难发生点火；RDX粉末在落锤撞击过程中经历缓慢的径向扩散、融化、快速流动以及溅射或者点火燃烧，其点火机理主要是粘性热。
Abstract:In order to study the impact sensitivity of RDX in low temperature environment, the visual drop hammer test device was designed. The research on the mechanics-chemical response characteristics and corresponding ignition probability of RDX powder explosive under low temperature environment and different drop heights were carried out,as well as the ignition mechanism was analyzed. The study show that the ignition probability of RDX powder explosive decreases with the decrease of ambient temperature, it is difficult to ignite RDX powder explosive at -50℃ and -100℃. RDX powder experiences slow radial diffusion, melting, rapid flow, sputtering or ignition combustion in the process of falling weight impact, the ignition mechanism of RDX powder explosive under drop weight impact is mainly viscous heat.
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