装药起爆位置对爆炸能量传递影响的数值模拟

Numerical Simulation on the Effect of Detonating Position of Charge to Transmission of Blast Energy

采用数值模拟软件LS-DYNA模拟了带壳装药在土壤层中在其不同端面起爆时爆炸产生的应力波,在上层半无限混凝土介质中的传播过程,得到了装药不同端面起爆时产生的应力波在混凝土中随时间和位置的变化规律。模拟结果表明,在装药底端面起爆时爆轰能量利用率较高,对混凝土的作用效果较好,能够为提高装药结构威力设计提供一定参考依据。

The process of transmission of stress wave produced by detonating charge at different sections of rock layer in top semi-infinite concrete layer is simulated using the numerical simulation software LS-DYNA. The transition laws of stress wave with the time-space produced by detonating charge at different sections in concrete are obtained, The simulation results show that the utilization rate of explosion energy is much high when detonating charge at bottom section, and the damage effect to concrete is better, This provides reference for improving the power design of charging structure.