带壳同轴复合装药破片输出特性研究

Characteristic of fragment for shelled coaxial ternary composite charge

为研究带壳同轴复合装药在不同起爆方式下的能量输出特性,以聚氨酯材料为隔爆材料,利用Autodyn有限元软件数值模拟了一端中心点起爆与一端外层六点起爆下复合装药战斗部内部冲击波传播、壳体膨胀破碎及破片特性,并将壳体膨胀过程、破片的轴向分布特性与相关试验结果进行了对比分析。研究结果表明,内层起爆下,隔爆材料延迟了爆炸冲击波对壳体内壁的作用时间,降低了内部装药反应产生的爆炸冲击波对壳体的驱动能力;外层起爆下,外部装药产生的爆轰波在战斗部中心轴线方向产生压力高达60 GPa的超压爆轰现象,使得破片最大速度较内层起爆下提高了30%,破片平均质量较内层起爆下降低了24.5%。

The characteristic of shock wave and fragment for shelled coaxial ternary composite charge containing internal charge,polyurethane as the attenuation layer and external charge is investigated.The propagation and interaction of the shock wave and cylindrical shell fracture for the composite charge are simulated under center point and outside six-point initiation meanwhile the verification test is conducted.Under internal initiation,the loading time of polyurethane on inner shell is reduced,leading to the decrease of the drive capability of the generated shock wave.Under external initiation,the overdriven detonation along the central axis of the warhead caused by the outer charge is observed,meanwhile the maximum velocity of the fragment is 30%higher than the inner layer detonation,and the average fragmentation mass is reduced by 24.5%.