基于射流变形机理被动电磁装甲板间距优化分析  

Optimization and Analysis on the Distance Between Armors of Passive Electromagnetic Armor on the Shaped Charge Jet Deformation Mechanism

作　　者：齐文达[1] 雷彬[1] 向红军[1] 孟学平[1] 

机构地区：[1]军械工程学院弹药工程系,河北石家庄050003

出　　处：《火炮发射与控制学报》2015年第4期1-4,18,共5页Journal of Gun Launch & Control

基　　金：国家自然科学基金(51307182)

摘　　要：为提高被动电磁装甲防护性能,基于时间窗原理和虚拟源点理论,建立了脉冲电流对不同速度聚能射流微元作用时间的数学模型,确立了射流微元受脉冲电流作用累积时间最长为结构优化目标,通过数值计算得到了虚拟源点到前装甲板距离之间越大以及射流头部速度和射流尾部速度比值越大,装甲板间距也越大的结论。在认为射流为全塑性体及电流完全分布在射流表面的情况下,得到了能够使射流产生变形的临界电流、与阿尔芬波速相关的变形时间常数和脉冲电流对射流微元的实际作用时间。此研究为电装甲板间距设计提供了参考。In order to improve the defense performance of passive electromagnetic armor against shaped charge jet(SCJ),the mathematic model is established of the acting time of pulse current on different velocity SCJ elements according to the time-window principle and virtual initial point theory.And the maximum accumulated acting time of pulse current on SCJ elements is the rule of armor space length optimization.Consequently,the results of numerical calculation indicate that the optimal armor space length becomes larger with the increasing distance between virtual initial point and front armor and the rising ratio of SCJ tip velocity to SCJ tail velocity.Under the supposed circumstances of the shaped charge jet being wholly elasto-viseo plastic body and the electric current being fully distributed on the surface of the shaped charge jet,the actual acting time is obtained through using the critical current which can cause the SCJ deformation and the characteristic time which is related to the Alfven waves.The analysis above will provide references for the design of armor space length.

关 键 词：被动电磁装甲 结构优化 射流 临界电流 阿尔芬波速 

分 类 号：TJ99[兵器科学与技术—武器系统与运用工程]