新型含能材料爆炸驱动能力数值模拟研究

Numerical Simulation of Explosive Driving Capability of New Energetic Materials

随着新型含能材料的不断深入研究,利用新型含能材料爆炸产生的强大能量进行驱动破片以达到更大的毁伤能力受到外界广泛关注.破片的飞行速度是评价破片毁伤威力大小的重要指标,故而对含能材料爆炸驱动破片的驱动能力评价和技术研究成为当前重要的研究课题.本文通过非线性动力学分析软件——AUTODYN软件对不同当量的3种含能材料TNT,HMX,HMX-TNT(1∶1)进行模拟数值仿真.建立了相应爆炸驱动装置仿真简化模型,设置TNT,HMX,HMX-TNT 3种含能材料当量分别为50 g,100 g,200 g时,对同一破片同一爆炸驱动装置进行爆炸驱动.仿真结果表明:不同爆炸驱动材料对于钨珠的驱动能力大小不同;本文利用破片最大速度和最大动量去表征含能材料的爆炸驱动能力大小,可以得出:同一质量情况下的爆炸驱动材料中,驱动能力大小依次为HMX>HMX-TNT>TNT,为破片驱动能力试验提供了数据支持和理论支持.

The explosion of new energetic materials can produce strong energy,which can drive fragments to achieve greater damage.The flying speed of the fragment is an important index for evaluating the damage power of the fragment.It is an important research topic to evaluate and study the explosive driving ability of energetic materials.The AUTODYN software is used to simulate the three energetic materials TNT,HMX,HMX-TNT(1∶1)with different equivalents.This paper introduces the corresponding simplified simulation model of explosive driving device.the equivalents of three energetic materials of TNT,HMX,and HMX-TNT are set to 50 g,100 g and 200 g,respectively.The explosion drives the same fragment and the same explosive driving device.The simulation results show that different explosive-driven materials have different driving capacities for tungsten beads,and it show that different explosive-driven materials have different driving capacities for tungsten beads.The maximum speed and momentum of the fragment are used to characterize the explosive-driving capacity of energetic materials.It can be concluded that in explosive-driven materials with the same mass,the sequence of driving capacity from high to low is:HMX,HMX-TNT,TNT.It provides data support and theoretical support for the fragment driving capability test.