聚黑-14C的传爆装置冲击起爆实验及数值模拟

Experiment and Numerical Simulation of Shock Initiation of JH-14C Detonation Device

基于聚黑(JH)-14C传爆药的小隔板试验方法及结果,建立了小隔板试验有限元模型并进行了模拟计算,确定了密度为1.65g/cm^3时JH-14C的Lee-Tarver参数。以RDX-8701为主发药柱,对实际装药条件下JH-14C的传爆装置进行了冲击起爆实验,得到了钢鉴定块的凹坑深度。根据小隔板试验确定的JH-14C传爆药Lee-Tarver参数,建立了全尺寸的冲击起爆实验有限元模型,并对比分析了模拟结果与实验结果,通过改变导爆药柱顶部的钢隔板厚度,确定了JH-14C的传爆装置发生冲击起爆的临界钢隔板厚度。结果表明,冲击起爆实验中钢鉴定块的凹坑深度约为2.1mm,模拟计算结果与实验结果基本吻合;JH-14C的传爆装置冲击起爆的临界钢隔板厚度在4~5mm。

Based on the test method and result of small scale gap test , the finite element model of small scale gap test was established and simulation calculation was carried out to determine the Lee-Tarver parameters of JH-14C boost-er explosive with the density of 1. 65g/cm^3. The shock initiation experiments of JH-14C detonation device were performed under the condition of actual charge, using RDX-8701 as the main charge, and the cave depth of steel identi-fication block was obtained. According to the Lee-Tarver parameters determined by small scale gap test , the full size finite element model of shock initiation experiments for JH-14C detonation device was established, and the simulation results were compared and analyzed with the experimental ones. The critical steel gap thickness of JH-14C detonation device in the shock initiation experiment was determined by changing the steel gap thickness at the top of detonating explosive. The results show that the cave depth of steel identification block in the shock initiation experiments is 2. 1 mm, and simulated results are in well agreement with the experimental ones. The critical steel gap thickness of JH-14C detonation device in the shock initiation experiment is from 4 mm to 5 mm.