聚能射流侵彻有限厚钢靶后效参数的特性OA北大核心CSTPCD

To study the characteristics of after-effect parameters of shaped charge jet penetrating finite thickness steel target,the experiments on small shaped charge jet formation and penetration on finite thickness plate with after-effect target were carried out.The numerical simulation on the process of shaped charge jet penetrating finite thickness target plate was carried out by AN-SYS/LS-DYNA finite software.The influence of target plate thickness,standoff and after-effect material density on the after-effect parameters of shaped charge jet penetration was analyzed,including the residual jet tip diameter d,tip velocity v and after-effect initiation ability v 2d.The results show that with the increase of target thickness,the after-effect initiation ability v 2d shows a lin-ear attenuation trend,and around 16%of the initial initiation parameter is lost for every 20 mm increase in thickness.In the range of standoff that the jet keeps continuous,with the increase of standoff,the after-effect initiation ability v 2d first increases and then decreases,and its stagnation point appears at the standoff of 8 times the shaped charge diameter.In the range of com-mon explosive density,with the increase of after-effect material density ρ,the attenuation rate of after-effect initiation ability v 2d first decreases and then increases.At the same time,there is a stagnation point in the v 2d-ρ curve.The peak value of v 2d is dis-tributed between ρ=1.6-1.8 g·cm-3,and the stagnation point position moves to the right with the increase of penetration time.