﻿ 电磁脉冲对装备机箱搭接缝耦合的研究

# 电磁脉冲对装备机箱搭接缝耦合的研究Analyses of Electromagnetic Coupling through Joint Lap on Equipment Enclosure under EM Pulse

Abstract: In this paper, the computer enclosure model is established, and both the enclosure and the joint lap are modeled by finite-difference time-domain method (FDTD) cells. Programs are written in Fortran Software and the electromagnetic coupling through joint lap is obtained from numerical simulation. From analyses of the field distribution and waveforms, it can be seen that resonance occurs and the resonant frequency depends on the enclosure dimension. Secondly, the shielding effectiveness of the enclosure is limited under the EM pulse, and the amplitude of the coupled electric field can reach as high as 1415 dBV/m. Finally, the coupled electric field in the joint lap width direction is larger than that in the length direction. Thus the electronic devices are supposed to locate in the joint lap length direction rather than the width direction.

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http://dx.doi.org/10.2528/PIER12072201

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