Critical shock initiation characteristics of TNT with different charging types

IF 1.7 4区 工程技术 Q3 MECHANICS
J. H. Wang, M. Xia, N. Jiang
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引用次数: 1

Abstract

To study the shock wave initiation characteristics of 2,4,6-trinitrotoluene (TNT) under different charging types, the shock wave pressure and shock wave attenuation of standard Pentolite explosives under different diaphragm thicknesses were quantitatively studied using the ion probe method. The gap tests of three explosives were carried out, including pressed TNT without restraint, pressed TNT with steel pipe restraint, and cast TNT with steel pipe restraint. The shock wave initiation pressures of TNT under the three different conditions were compared. Moreover, combined with the numerical simulation technology, the critical initiation pressure and the pressure cloud diagram of the gap test of TNT were obtained, and the dynamic change process of the shock wave in the diaphragm was acquired, which was difficult to measure in the experiments. The results showed that the critical initiation pressure of pressed TNT was significantly lower than that of cast TNT and that restraint can reduce the measured critical initiation pressure of TNT under certain conditions. Therefore, the research results may provide a basis for the damage range of TNTs with different charging types and the determination of the safety protection distance of shock wave initiation.

Abstract Image

不同装药类型TNT的临界起爆特性
为了研究不同装药类型下2,4,6-三硝基甲苯(TNT)的冲击波起爆特性,采用离子探针法定量研究了不同膜片厚度下标准戊olite炸药的冲击波压力和冲击波衰减。进行了三种炸药的间隙试验,包括无约束的压制TNT、有钢管约束的压制TNT和有钢管约束的铸造TNT。比较了三种不同条件下TNT的冲击波起爆压力。结合数值模拟技术,获得了TNT爆轰试验的临界起爆压力和压力云图,获得了实验中难以测量的冲击波在膜片内的动态变化过程。结果表明:压型TNT的临界起爆压力明显低于铸型TNT,在一定条件下抑制可以降低TNT的实测临界起爆压力。因此,研究结果可为不同装药类型tnt的损伤范围及冲击波起爆安全防护距离的确定提供依据。
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来源期刊
Shock Waves
Shock Waves 物理-力学
CiteScore
4.10
自引率
9.10%
发文量
41
审稿时长
17.4 months
期刊介绍: Shock Waves provides a forum for presenting and discussing new results in all fields where shock and detonation phenomena play a role. The journal addresses physicists, engineers and applied mathematicians working on theoretical, experimental or numerical issues, including diagnostics and flow visualization. The research fields considered include, but are not limited to, aero- and gas dynamics, acoustics, physical chemistry, condensed matter and plasmas, with applications encompassing materials sciences, space sciences, geosciences, life sciences and medicine. Of particular interest are contributions which provide insights into fundamental aspects of the techniques that are relevant to more than one specific research community. The journal publishes scholarly research papers, invited review articles and short notes, as well as comments on papers already published in this journal. Occasionally concise meeting reports of interest to the Shock Waves community are published.
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