HNS-Ⅳ炸药一维冲击起爆判据的研究

Study on One-dimensional Shock Initiation Criterion of HNS-Ⅳ Explosive

为了探究p-τ判据、James判据和Π-τ判据对六硝基茋(HNS-Ⅳ)炸药一维冲击起爆判据的适用性,以及利用飞片冲击起爆模型研究HNS-Ⅳ一维冲击起爆的可行性,结合已报道实验数据对三种判据进行了拟合,得到了最佳判据方程。通过AUTODYN软件模拟了不同厚度聚酰亚胺飞片对HNS-Ⅳ速度阈值的影响,基于模拟结果进行判据曲线的拟合,探究了利用飞片冲击起爆模型研究HNS-Ⅳ一维冲击起爆的可行性。模拟结果表明,速度阈值的模拟结果与实验结果存在偏差,这是由飞片驱动过程中形态和厚度变化所引起。拟合结果中p-τ判据、James判据和Π-τ判据的R2分别为0.9813,0.8715和0.9940,其中Π-τ判据拟合效果最佳,模拟结果与文献结果一致。根据Π-τ判据,文献数据和模拟数据得到的最佳判据方程分别为Π=0.156+0.013/τ和Π=0.175+0.012/τ,二者曲线基本重合,说明通过数值模拟研究HNS-Ⅳ一维冲击起爆是可行的。

To explore the applicability of the p-τcriterion,James criterion andΠ-τcriterion to the one-dimensional shock initiation criterion of 2,2′,4,4′,6,6′-hexanitrostilbene（HNS-Ⅳ）explosive,and study the feasibility of one-dimensional shock initiation of HNS-Ⅳ by flyer shock initiation model.The three criteria were fitted combined with reported experimental data and the best criterion equation was obtained.The influence of polyimide flyer with different thickness on HNS-Ⅳ velocity threshold was simulated by AUTODYN software,and the fitting of criterion curves were carried out based on the simulation results.The feasibility of investigating the one-dimensional shock initiation of HNS-Ⅳ was explored by flyer shock initiation model.The simulation results show that there is a deviation between the simulation result of the velocity threshold and the experimental one,which is caused by the change of shape and thickness during the flyer driving.In the fitting results,The R2 of p-τcriterion,James criterion andΠ-τcriterion are 0.9813,0.8715 and 0.9940,respectively.The fitting result ofΠ-τcriterion is the best,and the simulation result is consistent with the literature ones.According toΠ-τcriterion,the best criterion equation obtained by literature data and simulation data isΠ=0.156＋0.013/τandΠ=0.175＋0.012/τ,respectively,two curves basically coincide with each other,indicating that investigating the one-dimensional shock initiation of HNS-IV is feasible through numerical simulation.