含铝熔铸炸药冲击起爆数值模拟  

Numerical Simulation on Shock Initiation of Aluminized Melt-cast Explosives

作　　者：李淑睿 段卓平[1] 张震宇[2] 欧卓成 黄风雷[1] LI Shurui;DUAN Zhuoping;ZHANG Zhenyu;OU Zhuocheng;HUANG Fenglei(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Institute of Technical Physics,College of Science,National University of Defense Technology,Changsha 410073,Hunan,China)

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]国防科技大学理学院技术物理研究所,湖南长沙410073

出　　处：《兵工学报》2020年第S02期211-217,共7页Acta Armamentarii

基　　金：国家自然科学基金项目(U1630113);材料与结构冲击动力学创新项目(11521062)。

摘　　要：为建立适用于含铝熔铸炸药的冲击起爆细观反应速率模型,假设铝粉在冲击起爆过程中不发生化学反应,引入“含铝熔铸炸药基体炸药与铝粉混合法则”,基于孔隙塌缩热点形成机制,提出含铝炸药弹黏塑性球壳塌缩热点模型及其热点点火项反应速率方程;建立含铝熔铸Duan-Zhang-Kim细观反应速率模型。对2,4-二硝基苯甲醚基含铝炸药RBOL-2的冲击起爆过程进行数值模拟,对比发现不同加载压力下炸药到爆轰距离以及不同拉格朗日位置炸药到爆轰时间的计算结果与实验结果均吻合较好,表明该反应速率模型能够描述含铝熔铸炸药RBOL-2的冲击起爆特性。A three-term reaction rate equation is used to develop a mesoscopic reaction rate model based on the pore collapse hot-spots for the shocked aluminized melt-cast explosives.The aluminum is considered to be inert during the shock initiation,and a mixing rule is introduced to determine the ignition parameters of a mixture composed of the matrix explosive component and aluminum.A shocked DNAN-based aluminized melt-cast explosive was numerically simulated.The numerical results of the distances to detonation and the times to detonation at different Lagrange locations are in good agreement with the experimental data,which indicates that the mesoscopic reaction rate model is available for describing the shock initiation characteristics of aluminized melt-cast explosive.

关 键 词：含铝熔铸炸药 冲击起爆 细观结构 细观反应速率模型 

分 类 号：O381[理学—流体力学]