不同加载压力下炸药冲击起爆过程实验和数值模拟研究  

Experimental and Numerical Study on the Shock Initiation of PBXC03 Explosive under the Different Loading Pressure

作　　者：温丽晶[1,2] 段卓平[1] 张震宇[3] 欧卓成[1] 黄风雷[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]环境保护部核与辐射安全中心,北京100082 [3]国防科学技术大学理学院技术物理研究所,湖南长沙410073

出　　处：《兵工学报》2013年第3期283-288,共6页Acta Armamentarii

基　　金：国家自然科学基金重点项目(10832003;11076032)

摘　　要：采用炸药平面透镜爆轰加载及空气与隔板综合衰减技术,建立基于锰铜压阻传感器的一维拉格朗日实验分析系统,得到了3种加载压力下两种颗粒度PBXC03炸药冲击起爆不同拉格朗日位置的压力历史,以及加载压力对炸药冲击起爆过程的影响规律。采用DYNA2D程序,对两种颗粒度PBXC03炸药的冲击起爆过程进行数值模拟,计算结果与实验结果趋势一致。结果均表明:加载压力减小,炸药中前导冲击波速度增长变慢,压力增长变缓,炸药的到爆轰距离增加。数值模拟得到的两种颗粒度PBXC03炸药起爆压力和到爆轰距离的关系与文献[15]的POP图曲线吻合较好,验证了文献[14]建立的PBX炸药冲击起爆细观反应速率模型的合理性。The shock initiation experiments on the PBXC03 explosives in two different formulations, namely, the medium and the coarse one, are performed to obtained in-situ manganin piezoresistive pressure gauge data at various shock pressure. The loading technique of explosive plane-wave lens and the attenuation technique produced by both air-gap and Al-gap are used in the one-dimensional Lagrangian experimental system. The Numerical simulation on the shock initiation of the two kinds of PBXC03 explosives are performed by using the two-dimensional hydrodynamics software DYNA2D. The computational propagation trajectory and pressure growth process of the shock front agree well with the experimental data, and the computational run-distance-to-detonation points show good agreement with previously pub- lished Pop-plot data, which confirms that the mesoseopic reaction rate model used in this paper is reasonable.

关 键 词：爆炸力学 冲击起爆 拉格朗日测量技术 PBX炸药 加载压力 

分 类 号：O381[理学—流体力学]