轴向脉冲电流对全塑性铜射流的扭曲不稳定性作用分析  

Analysis of Effect of Axial Pulse Current on Kinking Instability of Full Plastic State Copper Jet

作　　者：齐文达 向红军 孔庆奕 容烨 QI Wenda;XIANG Hongjun;KONG Qingyi;RONG Ye(Department of Rail Transit,Hebei JiaoTong Vocational and Technical College,Shijiazhuang 050035,China;Department of Ammunition Engineering,Army Engineering University,Shijiazhuang 050003,China;National Key Laboratory of Electromagnetic Environment Effect,Army Engineering University,Shijiazhuang 050003,China)

机构地区：[1]河北交通职业技术学院轨道交通系,石家庄050035 [2]陆军工程大学弹药工程系,石家庄050003 [3]陆军工程大学电磁环境效应国家级重点实验室,石家庄050003

出　　处：《兵器装备工程学报》2019年第5期220-223,共4页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金项目(51307182);中国博士后基金项目(2018M633754)

摘　　要：建立了铜射流在全塑性态下的一维线性扭曲扰动控制方程,研究了轴向脉冲电流对聚能铜射流的变形破坏机理,得到了射流在轴向脉冲电流作用下的扭曲不稳定性随屈服极限、波数和时间的变化规律。当电容器充电电压为5140 V、轴向脉冲电流峰值为50 k A时,利用直径1. 75 mm铜丝进行了射流扭曲不稳定性静态模拟实验,证实了轴向脉冲电流对铜射流的扭曲破坏作用。In order to improve the protection ability of passive electromagnetic armor for shaped charge jets,both the small asymmetrical kink of shaped charge copper jet and the skin effect of pulse current on copper jet was considered,and the superpositionprinciple,full plasticity principle and the linear perturbation theory were used,and then the deformation and failure mechanism of shaped charge copper jet under axial pulse current was studied by using the one-dimensional linear distortion perturbation governing equation of copper jet in full plastic state,and the variation of kink instability with yield limit,wave number and time under axial pulse current was obtained.When the charge voltage of the capacitor is 5 140 V and the peak value of the axial pulse current is 50 kA,the static simulation experiment of copper jet kinking instability was carried out by using an copper wire with diameter of 1.75 mm,and the kinking and destroying effect of the axial pulse current on the copper jetwas verified.

关 键 词：被动电磁装甲 扭曲变形 趋肤效应 聚能射流 全塑性理论 

分 类 号：TJ99[兵器科学与技术—武器系统与运用工程]