起爆环半径对双层药型罩爆炸成形弹丸成形和侵彻特性的影响

Influence of Annular Initiation Radius on Formation and Penetration of Double Layer Liners EFP Warhead

起爆方式对双层药型罩爆炸成形弹丸(EFP)成形特征参数和终点毁伤效应有重要影响。利用ANSYS/LS-DYNA非线性有限元动力学软件研究了起爆环半径对双层药型罩EFP战斗部成形和侵彻特性的影响规律。研究结果表明,当起爆环半径的相对值φ为0.33~0.67时,随着起爆环半径相对值的增大炸药的能量利用率和侵彻体的特征参数显著提高。与端面单点中心起爆方式相比,当起爆环半径相对值为0.5时,双层药型罩EFP战斗部稳定成形侵彻体获得的动能增长了约19.7%,侵彻体的长径比增大了1.15倍,战斗部终点毁伤效应的最大侵彻深度约为1.14倍的装药口径。

Initiation modes have important influence on formation and penetration of double layer liners explosively formed projectile( EFP) warhead. The effect of annular initiation radius on formation and penetration of double layer liners EFP warhead is analyzed by using ANSYS/LS-DYNA software. The result shows the utilization rate of explosive energy and typical parameters of penetrator are improved obviously when the relative annular initiation radius is between 0. 33 and 0. 67. As the relative annular initiation radius is 0. 5,the kinetic energy is increased by 19. 7%,the length/diameter ratio of L/D( the)penetrator is increased to 1. 15 times,and the maximum penetration depth is about 1. 14 times of the charge diameter.