中文摘要：

为评价材料在强电磁脉冲作用下的屏蔽效能，根据同轴法屏蔽效能测试原理，建立了1套脉冲电场屏蔽效能测试系统，提出了采用脉冲峰值屏蔽效能和脉冲能量屏蔽效能共同评价材料对于电磁脉冲屏蔽效能的方法，并应用该测试系统对2种材料进行了屏蔽效能测试，分析了脉冲峰值和脉宽对材料屏蔽效能的影响。结果表明：随着脉冲峰值的增大，构成材料的金属纤维在强电磁脉冲作用下产生电晕放电使距离近的金属纤维相互导通，从而提高了材料的屏蔽效能；而当脉冲峰值不变，随着脉宽的变化，材料的屏蔽效能并无变化。以上结果表明：脉冲峰值是影响材料屏蔽效能的主要因素。

英文摘要：

We evaluated the effect of materials on shielding ability under electromagnetic pulse（EMP） using a measurement system established by the flange coaxial method shielding effectiveness （SE） test theory, and put forward the method of evaluating the shielding ability according to pulse peak value SE and pulse energy together. Moreover, we tested the SEs of two materials, and analyzed how these SEs influence the pulse peak value and the pulse width. The results show that when the pulse peak value rises, a metal fiber would connect to nearby ones through its corona discharge due to high EMP radiation, so the SE of the material is enhanced. However, when the peak value of pulse is fixed, the SE of the material does not change with the pulse width. In conclusion, the pulse peak value is the main factor that influences the SE of material.