壳体厚度对战斗部爆炸气泡特性影响的数值模拟研究

采用LS-DYNA软件,对装药半径为0.15m、0.42m、0.55m的战斗部有、无壳体的爆炸特性进行数值模拟研究,分析了炸药在有无壳体的水下爆炸时的冲击波压力、气泡脉动压力等特性参数,对比总结了不同当量、不同装药半径及有无壳体的数值计算结果。结果表明:壳体对水下爆炸气泡脉动的影响是较为显著的。壳体厚度对气泡形成时间没有太多影响,但对气泡压力峰值影响较大。因此,研究战斗部水下爆炸威力时必须考虑壳体因素,不能简化。

Research on Numerical Simulation for Influence of Shell Thickness on Bubble Characteristics of Warhead Explosion

The explosive characteristics of warhead with and without shell under charge radius of 0.15 m, 0.42 m, and 0.55m are numerically simulated using LS-DYNA software. The characteristic parameters of shock wave pressure and bubble pulsationpressure of the charge with and without shell during underwater explosion are analyzed. Numerical calculation results of different e-quivalents, different charge radius and with/ without shell are compared and concluded. Research results indicate that effect of shellon underwater explosion bubble pulsation is remarkable ; while the thickness of shell does not have much influence on formation timeof bubble, it is of great influence on pressure peak of bubble. Therefore, the shell of warhead must be considered in underwater ex-plosion research