| 带孔缝机箱对电磁脉冲的屏蔽效能研究 |
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| 引用本文： | 杨永亮,王化深.带孔缝机箱对电磁脉冲的屏蔽效能研究[J].铁路计算机应用,2011,20(5):12-14. |
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| 作者姓名： | 杨永亮 王化深 |
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| 作者单位： | 北京交通大学,电子信息工程学院,北京100044 |
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| 摘 要： | 在铁路系统中，为保证设备不受外界的电磁干扰，经常对设备采用金属机箱屏蔽的措施，而金属机箱上又不可避免地开有各种孔缝。本文研究电磁脉冲斜入射情况下带孔缝的金属机箱的屏蔽效能，和正入射情况下的屏蔽效能作比较。文中指出了屏蔽效能的计算方法，对不同形状和不同数目的孔缝情况下机箱的屏蔽效能进行比较分析。在孔缝面积相同的情况下，开圆形孔和方形孔的机箱屏蔽效能要比开矩形孔的机箱高，多孔机箱屏蔽效能要高于单孔情况下机箱的屏蔽效能。
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| 关 键 词： | 电磁脉冲 孔缝 屏蔽效能 |
Study on shielding effectiveness of electromagnetic pulse to metal enclosure with slot |
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| YANG Yong-liang,WANG Hua-shen.Study on shielding effectiveness of electromagnetic pulse to metal enclosure with slot[J].Railway Computer Application,2011,20(5):12-14. |
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| Authors: | YANG Yong-liang WANG Hua-shen |
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| Institution: | YANG Yong-liang,WANG Hua-shen(School of Electronic and Information Engineering,Beijng Jiaotong University,Beijng 100044,China) |
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| Abstract: | In railway systems,the equipments were often shielded with metal enclosure to protect them from external electromagnetic interference.But it couldnt’ be avoided that there were different kinds of slots on the enclosure.This paper researched on the shielding effectiveness of the metal enclosure when electromagnetic pulse(EMP) propagated into slots with an angle,and compared it with the result that the direction of EMP’s propagation was vertical to the slot.The paper showed the calculation method of the shielding effectiveness,and analyzed the shielding effectiveness of the metal enclosure with different shapes and numbers of slots.When the area of the slot is the same,the shielding effectiveness of metal enclosure with circular and square slot was higher than that with rectangular slot.The shielding effectiveness of metal enclosure with multi-aperture was higher than that with single aperture. |
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| Keywords: | electromagnetic pulse(EMP) slot shielding effectiveness |
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