锥壳形战斗部爆炸破片的速度特性及形成模式研究

Research on fragment velocity characteristics and formation models of conical warhead

本文揭示了战斗部爆炸破片的形成机理,采用了SPH方法仿真模拟了锥壳形战斗部壳体膨胀碎裂成破片的过程,在此基础上开展了对比实验,得到了锥壳形战斗部爆炸破片速度特性和形成模式。结果表明:锥壳形战斗部远端封盖形成的破片的速度是近端封盖的1.3倍,且锥壳上破片沿轴向的速度远高于其它壳体高度上测点的速度。锥壳形战斗部爆炸破片以拉伸模式为主,占总破片的49.3%;拉-剪混合模式次之,占总破片的30.4%;剪切模式最少,占总破片的20.3%。

The formation mechanism of fragments on warhead was revealed and the expansion and crack of the conical warhead case were simulated by using SPH method.The contrast experiment was carried out based on the simulation,and the fragment velocity characteristics and formation models of conical warhead have been obtained.It is concluded that the conical warhead fragment velocity of the far end is 1.3 times than that of the near end and the axial velocity of the fragments on the head of the conical warhead is higher than those at other measuring points on the case of the same height.Most of the conical warhead fragments are of tensile model with a percentage of 49.3,followed by tensile-shear model with a percentage of 30.4.Only a few are of shear model,the percentage is 20.3.