Al/PTFE活性材料弹丸冲击/爆燃行为数值模拟研究

针对活性材料冲击/爆燃释能行为的定量研究问题，基于AUTODYN软件的二次开发功能，编写了适用于活性材料的状态方程、点火模型及整体反应度计算子程序，实现了对活性材料弹丸在高速侵彻过程中爆燃反应行为的数值模拟.通过对Al/PTFE活性材料弹丸高速碰撞2024铝合金间隔靶板的数值模拟，得到了碰撞过程中活性破片的形貌演化规律，以及粒子反应度、温度、压力等参量随时间的变化曲线，进而实现了对活性材料冲击/爆燃释能行为的定量分析. 结果表明，反应度随时间的变化趋势与试验中活性材料弹丸释能发光的变化趋势一致，温度计算与先前试验结果相符，说明该数值模拟方法可以很好地反映Al/PTFE活性材料弹丸在高速撞击过程中的冲击/爆燃释能过程. 

Numerical Simulation Method of Impact/Deflagration Behavior by Reactive Materials Projectile

Aiming at the quantity research on the impact/deflagration behavior of reactive materials, the user subroutines of equation of state (EOS), ignition model and overall reaction ratio were edited and compiled based on the secondary development function of AUTODYN codes, and then the numerical simulation on impact/deflagration behavior by reactive materials projectile during high speed penetration was conducted. Based on the numerical simulation of high-speed collision of Al/PTFE reactive materials projectile with 2024 aluminum spacer plate, the morphologic evolution of Al/PTFE reactive materials fragments was obtained, and the variation of reaction ratio, pressure and temperature of reactive materials particle versus time during the impact event were extracted, so that the quantity research on the impact/deflagration behavior of reactive materials was achieved. The simulation results show that the trend of overall reaction ratio calculated with time is well consistent with the deflagration flame in experiments, and the temperature is compatible with previous research, implying that the proposed simulation method can reproduce the impact and energy release process by Al/PTFE reactive materials projectile at a high level.