多枚破片冲击引爆带盖板炸药数值模拟分析  

Numerical Simulation on Shock Initiation of Composition Explosive of Cover Board Subjected to Multi-fragment

作　　者：梁斌[1] 冯高鹏[1] 魏雪婷[1] 

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《弹箭与制导学报》2013年第6期62-66,69,共6页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(11002134);863项目资助

摘　　要：为分析破片数量和分布方式对冲击起爆的影响规律,采用非线性动力分析程序AUTODYN-3D开展了不同破片数量及破片横、纵向间隔对起爆阈值影响的数值模拟。采用"升-降"法获得了接触情况下B炸药起爆阈值。结果表明,多破片同时或非同时撞击盖板炸药,其产生的冲击波的累积叠加作用是明显的;相同间隔情况,随破片数量的增加,冲击起爆速度阈值逐渐减小,6枚破片同时冲击的起爆速度阈值约为单枚破片冲击阈值的65%;多破片同时撞击炸药过程中,随着破片横向和纵向间距的增大,起爆阈值逐渐增大并逐渐趋于单枚破片冲击阈值。研究结果对新型反导战斗部破片杀伤元素的设计具有一定的参考价值。The numerical simulation results of shock initiation performance of composition B explosive with cover board subjected to tungsten fragments with different number and distribution were presented. In order to study the fragment parameter effect on shock initiation of com- position B explosive. Numerical simulation of different number and distribution tungsten fragments which impact on cover board and compo- sition B explosive were conducted with AUTODYN software. The critical detonation velocity of composition B explosive was obtained by the ＂ up-down＂ method. It is indicated the superposition of shock wave caused by that multi-fragments impact on composition B explosive at the same time or not has an obvious effect on the critical detonation velocity and detonation time. When multi-fragments impact on composition B explosive at the same time, the critical detonation velocity of shock initiation decrease with the fragment number increase. The initiation detonation velocity of composition B explosive impacted by six fragments at the same time is about of 65% comparer to the situation that the explosive is impacted by single fragment. While the explosive is impacted by multi-fragments at the same time, the initiation detonation ve- locity increases gradually with the distance of horizontal and uprightness orientation increase, and tenas to a critical value of one fragment.

关 键 词：爆炸力学 冲击起爆 多破片 冲击波 

分 类 号：TJ410.3[兵器科学与技术—火炮、自动武器与弹药工程]