聚能射流对厚壁移动靶的侵彻理论与数值模拟分析  

Theoretical Model and Numerical Study of Shaped Charge Jet Penetrating into Thick Moving Target

作　　者：贾鑫[1] 黄正祥[1] 徐梦雯 肖强强[1] JIA Xin;HUANG Zhengxiang;XU Mengwen;XIAO Qiangqiang(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]南京理工大学机械工程学院

出　　处：《兵工学报》2019年第8期1553-1561,共9页Acta Armamentarii

基　　金：国家自然科学基金项目(11602110)

摘　　要：为有效拦截摧毁来袭大壁厚高速运动的导弹和钻地弹,提出了一种采用破甲战斗部的攻击模式。基于虚拟源点理论并采用微元法,将射流微元与厚壁移动靶板的相互作用过程分为两个阶段:第一阶段,射流微元在侵彻过程中不受靶板侧向力干扰,分析了该过程侵彻深度和孔径的变化规律;第二阶段,射流在侵彻过程中受到靶板的侧向干扰,建立了射流受干扰时的横向漂移速度及受干扰射流的侵彻深度等理论模型。为验证理论模型的正确性,设计了一种40mm口径聚能装药,通过有限元软件LS-DYNA分析了聚能射流垂直侵彻不同移动速度靶板(0~600m/s)的侵彻深度及孔径变化规律,同时结合Marmor等[17]的试验数据,与所建理论模型计算结果进行对比。结果表明:破甲战斗部是对付高速运动厚壁战斗部的有效手段,所建理论模型可精确地计算出射流微元在各个阶段的运动状态,从而获得总侵彻深度随靶板运动速度变化的规律;靶板运动速度越高,无干扰侵彻阶段经历时间越短,射流受干扰程度越明显,破甲深度与扩孔孔径也越小。An attack mode using shaped charge jet is proposed to effectively intercept and destroy the incoming high-speed missiles and earth-penetrating projectiles with large wall thickness.Based on virtual origin theory,an infinitesimal method is used to divide the interaction process of shaped charge jet and thick moving target into two stages:undisturbed jet penetration and disturbed jet penetration.At the undisturbed jet penetration stage,the jet is not be disturbed by lateral force on target plate.The penetration depth contributed by undistributed jet and the aperture of cavity were analyzed.At the disturbed jet penetration stage,the jet is disturbed by lateral force on target plate.The models of lateral drift velocity and penetration depth of distributed jet were established.A 40 mm-diameter shaped charge was designed to verify the theoretical model.The penetration depth of jet penetrating into steel target at the transverse velocity of 0-600 m/s was calculated using the LS-DYNA software.The theoretical results of the proposed model were compared with the experimental data in Ref.[17].The results indicate that the shaped charge warhead is an effective means to strike high speed moving target.The higher the moving speed of target is,the shorter the elapsed time at the undisturbed jet penetration stage is,the more the interference of jet is,and the smaller the penetration depth is.

关 键 词：聚能射流 移动靶 侵彻深度 厚壁 虚拟源点 数值模拟 

分 类 号：TJ410.333[兵器科学与技术—火炮、自动武器与弹药工程]