装甲结构对被动电磁装甲防护射流性能的影响

为了实现被动电磁装甲对射流产生更加充分的破坏作用,减小装甲结构设计对射流参数的依赖性,提出了多层板结构被动电磁装甲。通过对多层板装甲等效电路的分析可知,在射流电阻占系统电阻主导的情况下,随着装甲板层数的增加,通过射流和装甲板的脉冲电流将大大提高。同时对多层装甲板电感计算可知,多层装甲板能够有效减小系统电感。通过对射流在多层装甲板间运动规律的分析,建立了脉冲电流对射流作用的数学模型,通过数值计算可知多层装甲板结构能有效减小射流头部和尾部的有效侵彻长度,并增加脉冲电流对射流的作用时间。

Effect of armor structure on defense performance of passive electromagnetic armor against shaped charge jet

To make the shaped charge jet (SCJ) against the passive electromagnetic armor (PEA) more effectively and reduce the dependency about structural design of PEA on different SCJ parameters, a multi-layer plate armor structure is advanced. Through analyzing the equivalent circuits of different multi-layer plates PEA, an outcome can be obtained that the current passing the SCJ and armors increases with the increasing of the armor number when the resistance of the PEA almost equals the SCJ resistance. Moreover, multi-layer plates can reduce the PEA inductance. A mathematical model about the acting time of pulse current on SCJ is established by analyzing the motion law of SCJ among the armors. The results of the numerical calculation indicate that the multi-layer plate armor structure can reduce the valid penetration length of SCJ tip and tail and can increase the acting time of pulse current on SCJ.