冲击波和破片复合作用下炸药起爆数值模拟  

Numerical simulation on initiation of charge under combined action of shock wave and fragment impact

作　　者：孙宝平[1] 段卓平[1] 张震宇[2] 刘彦[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]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：《爆炸与冲击》2013年第S1期40-46,共7页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10832003;11076032);国家安全重大基础研究项目(61383)

摘　　要：为研究炸药在冲击和破片复合作用下的起爆反应特性,采用三项点火-增长反应速率模型和欧拉算法模拟炸药起爆反应,得到破片撞击未损伤炸药起爆临界速度在497~500m/s之间,与实验吻合较好;通过改变三项点火-增长反应速率模型中的表面燃烧项系数G1模拟损伤炸药起爆反应。研究结果表明,三项点火-增长反应速率模型中的表面燃烧项系数G1能反映冲击损伤炸药颗粒尺寸变化对炸药起爆感度的影响。To study the initiation characteristics of charge subjected to the combined action of shock wave and fragment impact,the initiation reaction of the undamaged explosive was numerically simulated by the three-term ignition-and-growth reaction rate model.The critical impact velocity range from 497to 500m/s was obtained for the initiation reaction of the undamaged explosive.And it is in agreement with the experimental result.The initiation reaction of the pre-damaged explosive was numerically simulated by changing the coefficient G1 in the three-term ignition-and-growth reaction rate model.The coefficient G1 in the model can reflect that the particle size change of the shock-damaged explosives affect the sensitivity of the explosives.

关 键 词：爆炸力学 起爆 破片撞击 损伤装药 冲击载荷 

分 类 号：TQ560.1[化学工程—炸药化工]