Effect of axial pulse magnetic field on shaped charge jet action
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摘要: 为掌握轴向脉冲磁场对金属射流的作用规律，基于破甲弹金属射流对目标的作用原理及磁场与金属射流之间的相互作用关系，设计了励磁线圈对破甲弹金属射流作用的试验系统，并开展了相关实弹试验，突破了金属射流形成和励磁线圈脉冲电流产生之间时序匹配的关键技术，得出了使金属射流发生有效变形的合理储能电容器组电参数和励磁线圈结构参数。试验结果表明，当电容器电压为5 kV、电容为1 200 μF、励磁线圈长度为50 mm时，破甲弹金属射流对目标靶板的侵彻穿深增量最大，破甲效果最佳；各因素对破甲弹金属射流侵彻穿深能力影响程度由大到小分别是电容器组充电电压、电容器组电容、线圈长度。研究成果为破甲弹威力电磁增强技术可行性论证、原理试验及励磁线圈结构设计提供了重要的理论和技术支撑。Abstract: In order to understand the effect of axial pulse magnetic field on the shaped charge jet (SCJ), we designed an experiment system and carried out related experiments based on the mechanism of a high-explosive anti-tank (HEAT) penetrating a target and the interaction between the magnetic field and SCJ, and came up with the key technology to match the time sequence between the formation of SCJ and the pulsed current generation of the coils, which was a major breakthrough. The experiment results show that the increment of the penetration depth for SCJ penetrating the target is largest when the voltage is 5 kV, the capacitor is 1 200 μF and the length of coil is 50 mm. The influence factors of the penetration depth are respectively the charging voltage of the capacitor, the capacitance and the coil length, each in a descending order. These results provide an important theoretical foundation and technical support for the feasibility demonstration, principle test and related physical design of the coil of the enhanced HEAT by the electromagnetic method.
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Key words:
- axial pulse magnetic field /
- high-explosive anti-tank (HEAT) /
- shaped charge jet /
- pulse current /
- coil
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图 1 线圈磁场对破甲弹金属射流的作用原理
Figure 1. Action principle of magnetic field of coil on shaped charge jet of HEAT
图 2 励磁线圈对破甲弹金属射流作用的试验系统
Figure 2. Experiment system of effect of pulse current on shaped charge jet
图 4 不同脉冲电流幅值下磁感应强度随时间的变化
Figure 4. Variation of magnetic flux intensity with time under different amplitudes of pulse current
图 5 不同脉冲电流幅值下金属射流应变随时间的变化
Figure 5. Variation of effective strain of shaped charge jet with time under different amplitudes of pulse current
表 1 不同充电电压下破甲弹起爆的延时时序
Table 1. Delay time sequence of HEAT firing under different charge voltage
充电电压/kV tc/μs 3 926~1 041 5 418~533 6 368~483 
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表 2 试验原始数据
Table 2. Experiment data
No. U/kV L/mm C/μF B/T d/mm 1 0 0 0 0 52.10 2 0 50 0 0 56.08 3 0 100 0 0 53.96 4 0 150 0 0 52.90 5 3 100 800 9.68 54.10 6 3 50 1 200 9.74 56.20 7 5 100 1 200 14.84 77.90 8 5 50 800 14.63 77.04 9 5 50 1 200 17.25 97.80 10 6 150 1 200 10.51 58.94
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表 3 正交试验因素水平表
Table 3. Orthogonal factor level table
因素水平 U/kV L/mm C/μF 1 3 50 800 2 5 100 1 200
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表 4 极差分析
Table 4. Range analysis
分析结果 侵彻深度指标 U L C K1, ave 55.15 66.62 66.57 K2, ave 77.74 66.00 67.05 R 22.59 0.62 1.48
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