电磁脉冲对方舱门缝耦合效应的数值分析

Numerical Analysis on Electromagnetic Pulse Coupling to the Door Aperture of Square Cabin

利用时域有限差分法研究了高空核爆电磁脉冲对方舱门缝的耦合效应,分析了电磁脉冲不同极化方向、入射角度和门缝填充材料对耦合效应的影响,研究表明:电磁脉冲对方舱门缝的耦合效应较强,方舱的谐振效应对耦合场有明显的增强作用。入射电磁脉冲的极化方向与方舱门缝长边垂直时的耦合场最强,电磁脉冲垂直入射时的耦合场强最高,随着入射角度的降低,耦合场强逐渐降低。门缝填充材料可明显提高方舱的电磁脉冲屏蔽效能,屏蔽效能与填充材料的电导率成正比。

The effect of electromagnetic pulse coupled to square cabin ＆#39;s door aperture is studied using finite difference time-domain method .The influences of different polarization direction , incident angle and filling material to the coupling effect are analyzed in this paper .The calculation results indicate that the coupling effect of HEMP to the square cabin＆#39;s door aperture is quite strong and the resonance effect can enhance the cou -pled electric field .The coupled electric field is strongest when the polarization direction is vertical to the longer side of the door aperture .The coupled electric field is decreased with the decreasing of incident angle .The fill-ing material of door aperture can enhance the shielding performance obviously .The shielding performance is higher when the conductivity of the filling material is bigger .