摘要
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 performance against shaped charge jet（SCJ）, we studied the deviating effect of passive electromagnetic armors on SCJ. We developed 3-D simulation models of the kinking and the passive electromagnetic armor to simulate the deformation of SCJ by using a finite element simulation software. Then, we conducted the static analog experiments and the penetration experiments, and simulation experiment was carried out with 1 mm copper wires. Results show that both the transverse electromagnetic force and the kinking instability can cause the lateral deviation of SCJ. Results of analog experiments with copper wires illustrate that the bend of copper wires becomes more and more serious with the rising of charging voltage, moreover, when the charging voltage rises to 5 k V and the peak current is 40 k A, the copper wire will break. What is more, results of penetration experiments with armor piercing projectiles illustrate that the deviation of SCJ splash on the back armor occurs when the charging voltage rises to 2 170 k V and the peak current is 50 k A. The experimental results indicate that the deviating effect of passive electromagnetic armor on SCJ becomes stronger and the penetration capability is declined with the rising of charging voltage and current.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2015年第3期1008-1014,共7页
High Voltage Engineering
基金
国家自然科学基金(51307182)~~
关键词
电装甲
聚能射流
横向偏移
脉冲电流
弯曲不稳定性
横向电磁力
electromagnetic armor
shaped charge jet
lateral deviation
pulse current
bending instability
transverse force
