炸药冲塞点火的数值模拟

doi:10.3969/j.issn.1000-1093.2012.09.014

兵工学报 ›› 2012, Vol. 33 ›› Issue (9): 1101-1106.doi: 10.3969/j.issn.1000-1093.2012.09.014

炸药冲塞点火的数值模拟

张韩宇，段卓平，孙文遂，黄风雷

(北京理工大学爆炸科学与技术国家重点实验室，北京 100081)

收稿日期:2011-11-15 修回日期:2011-11-15 上线日期:2014-03-04
作者简介:张韩宇（1987—），男，硕士研究生
基金资助:
国家自然科学基金重点项目（10832003）；国家安全重大基础研究（国防“973”计划）项目（61383）

Numerical Simulation of Ignition of Explosives in Spigot Test

ZHANG Han-yu, DUAN Zhuo-ping, SUN Wen-sui, HUANG Feng-lei

(State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology,Beijing 100081, China)

Received:2011-11-15 Revised:2011-11-15 Online:2014-03-04

摘要/Abstract

摘要： 为研究和评价炸药在机械撞击作用下的安全性，采用节点约束-分离的数值计算方法，联合热弹塑性材料本构方程和化学动力学方程，对PBX-2炸药的冲塞点火过程进行了数值模拟。探讨了网格尺寸对炸药冲塞温升的影响，获得了炸药冲塞过程中的力学破坏物理图像和局部温度时间曲线，计算得到了PBX-2炸药冲塞点火的临界跌落撞击速度。结果与实验值吻合较好，表明该方法可以有效地描述炸药冲塞破坏和热-力-化耦合作用下的点火反应。

关键词: 爆炸力学, 冲塞试验, 炸药点火, 节点约束-分离, 化学动力学方程, 数值模拟

Abstract: To investigate the ignition mechanism of explosives under impact, the node tie-breaking method combined with the thermo-elastic-plastic material constitution and chemical kinetics equations was used to simulate ignition for explosives of PBX-2. The influence of mesh size on the explosive's temperature rising was discussed. The explosive's mechanical damage image in the spigot test and local temperature rising curve were obtained. The critical drop velocity of ignition was calculated. The results are consistent with the experiment data better. It indicates that the approach can effectively describe the explosive's damage and ignition reaction under thermal-mechanical-chemical coupled effect.

Key words: explosion mechanics, spigot test, ignition of explosive, node tie-breaking, chemical kinetics equation, numerical simulation

中图分类号:

O389

张韩宇，段卓平，孙文遂，黄风雷. 炸药冲塞点火的数值模拟[J]. 兵工学报, 2012, 33(9): 1101-1106.

ZHANG Han-yu, DUAN Zhuo-ping, SUN Wen-sui, HUANG Feng-lei. Numerical Simulation of Ignition of Explosives in Spigot Test[J]. Acta Armamentarii, 2012, 33(9): 1101-1106.

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炸药冲塞点火的数值模拟

Numerical Simulation of Ignition of Explosives in Spigot Test

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