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为了实现被动电磁装甲对射流的防护作用,分别对轴向脉冲电流对射流的颈缩、扭曲作用及装甲板对射流产生的横向电磁力作用机理进行了理论分析,考虑脉冲电流趋肤效应和射流为率相关弹塑性模型的前提下,利用ANSYS对这三种作用机理进行了电磁结构耦合仿真,分别得到了电流密度、磁感应强度、电磁力在射流上的分布规律以及射流的最终变形。最后针对三种作用机理分别进行了实验,实验结果证实了被动电磁装甲能够对射流产生破坏作用,在静破甲试验中,当充电电压为5 k V左右,峰值电流为150 k A时,直径为39.2 mm的破甲弹产生的射流侵彻深度降低了8.6%。
In order to realize the protective effect of the passive electromagnetic armor on the jet, the mechanism of the axial pulse current on the neck of the jet, the torsional action and the transversal electromagnetic force produced by the armor plate are theoretically analyzed. Considering the pulse current skin effect and the jet For the rate-dependent elastic-plastic model, the three mechanisms were simulated by electromagnetic coupling using ANSYS. The current density, the magnetic flux density, the distribution of electromagnetic force on the jet and the final deformation of the jet were obtained respectively. Finally, experiments were carried out on three mechanisms respectively. The experimental results confirm that the passive electromagnetic armor can destroy the jet. In the static armor test, when the charging voltage is about 5 kV and the peak current is 150 kA, the diameter The depth of penetration of the jets resulting from the 39.2 mm armor shells decreased by 8.6%.