Abstract
In this paper, the finite element method is utilized to research the coupling effects between the strong electromagnetic pulse and the computer box with holes. Focus on the influence law of the box size on shielding effectiveness of computer box against strong electromagnetic pulses. The relationship between the simulation resonance frequency and the theoretical results is obtained; the influence of the holes shape and size on shielding effect is also obtained. It is concluded that the computer boxs shielding effect is poor under the resonance frequency, and there is no linear relationship between shielding effect and holes size when the frequency is determinated. The shielding effect doesnt become worse with the holes size increasing.
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