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为了提高被动电磁装甲对聚能射流的防护性能,对被动电磁装甲对射流的横向偏移作用进行了研究。利用有限元仿真软件,建立了扭曲和装甲结构两个三维有限元模型对射流的变形进行了仿真,最后进行了静态模拟试验与破甲试验,利用直径1 mm铜丝进行了模拟实验。结果表明:射流的弯曲不稳定性和电磁装甲产生的横向电磁力都能造成射流产生横向偏移;铜丝模拟实验结果表明,随着充电电压的升高,铜丝横向弯曲越来越严重,当电压升高到5 k V、峰值电流为40 k A时,铜丝出现了断裂;利用破甲弹进行的静破甲试验结果表明,当充电电压升高至2 170 V、峰值电流为50 k A时,射流由于受到横向电磁力作用,后装甲板上射流飞溅的痕迹向一侧发生了偏移。模拟与破甲试验结果进一步证实:随充电电压和峰值电流的升高,被动电磁装甲能够使射流产生更大的横向偏移作用,从而降低射流对装甲的侵彻能力。
In order to improve the protective performance of passive electromagnetic armor on the jets, the effect of passive electromagnetic armor on the lateral migration of jets was studied. The finite element simulation software was used to simulate the deformation of the jet with two three-dimensional finite element models of twisted and armored structures. Finally, the static simulation test and the armor test were carried out. The simulation experiments were carried out by using 1 mm diameter copper wire. The results show that the jet bending instability and the transverse electromagnetic force generated by the electromagnetic armor can cause the lateral displacement of the jet. The copper wire simulation results show that as the charging voltage increases, the transverse bending of the copper wire becomes more and more serious, The copper wire fractured when the voltage was raised to 5 kV and the peak current was 40 kA; the static armor test using a Detonator showed that when the charging voltage was raised to 2 170 V and the peak current was 50 k A, the jets were impacted by the lateral electromagnetic force and the jet of the jet on the aft deck deflected to one side. Simulation and Penetration Test results further confirmed: With the charging voltage and peak current increases, passive electromagnetic armor can make the jet greater lateral offset, thus reducing the penetration of the jet on the armor.