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采用基于有限积分方法的电磁仿真软件CST-MWS建立电磁脉冲辐照条件下材料屏蔽效能测试模型,提出脉冲峰值屏蔽效能和脉冲能量屏蔽效能两个方案来评价材料屏蔽能力,并通过仿真分析了电磁脉冲上升时间和脉宽对屏蔽效能的影响。结果表明,脉冲上升时间相对于脉宽对屏蔽效能的影响较大,上升时间越短,屏蔽效能越高,峰值屏蔽效能高于能量屏蔽效能;脉宽对于材料的峰值屏蔽效能基本没有影响,能量屏蔽效能随着脉宽的增大而减小。
A finite element method-based electromagnetic simulation software CST-MWS was used to establish the material shielding effectiveness test model under the condition of electromagnetic pulse irradiation. Two schemes of pulse peak shielding efficiency and pulse energy shielding efficiency were proposed to evaluate the material shielding ability. The electromagnetic Effect of Pulse Rise Time and Pulse Width on Shielding Effectiveness. The results show that the pulse rise time has a greater influence on the shielding effectiveness than the pulse width. The shorter the rise time is, the higher the shielding effectiveness is and the higher the shielding effectiveness is. The pulse width has no effect on the material’s shielding effectiveness. The energy Shielding effectiveness decreases with increasing pulse width.