高空核电磁脉冲照射下车辆表面感应电流研究

高空核电磁脉冲(HEMP)照射下车辆表面感应电流的研究是装甲车辆电磁防护工作的组成部分。根据IEC6100发布的高空核电磁脉冲波形标准,文中建立了高空核电磁脉冲照射下车辆表面感应电流仿真电磁模型,并使用基于FDTD算法的CST软件进行仿真。通过改变HEMP照射方向和去除炮管部位,对比研究不同频点的车辆表面感应电流最大值和峰值区域的变化情况。实验结果表明,不同角度的车辆表面感应电流最大值与照射方向车辆表面结构的复杂度呈正相关变化,在炮管部位有远高于其它部位的感应电流。文中车辆最大感应电流参考值为1.82×103 A/m,重点防护频段为0~40 MHz。

Study on the Surface Induced Current of Vehicles Irradiated by High-altitude Nuclear Electromagnetic Pulse

The induced current on the surface of vehicles under high-altitude nuclear electromagnetic pulse (HEMP) illumination is an critical problem of the electromagnetic protection of armored vehicles. The high-altitude nuclear electromagnetic pulse waveform released by IEC6100 was selected in this study to establish the simulation electromagnetic model of induced current on vehicle surface under high-altitude nuclear electromagnetic pulse irradiation. Meanwhile, the CST software based on FDTD algorithm was used for simulation analysis. Through changing the irradiation direction of HEMP and removing the gun tube, the variation of the maximum and peak areas of the induced current on the vehicle surface at different frequency points were compared and studied. Experimental results showed that the maximum induced current of vehicle surface at different angles was positively correlated with the complexity of vehicle surface structure in the irradiation direction, and the induced current in the gun barrel was much higher than that in other parts. The reference value of the maximum induced current of vehicle was 1.82×10 ³ A·m ^-1, and the key protection frequency range was 0~40 MHz.