| 摘要: |
| 高空核爆电磁脉冲（HEMP）对电子/电气设备构成严重威胁，是电磁兼容与电子/电气
设备安全领域的重要研究内容。基于时域有限差分法（FDTD）的总场-散射场体系建立仿真
空间，推导了连接边界的一维平面波引入方法，选择双层金属腔体为研究对象，仿真分析了
腔体在HEMP平面波作用下透过孔缝在各采样点的响应过程。仿真结果显示，各采样点都出现
了明显的振荡波形，其中外金属腔体孔缝中心比内金属腔体内部中心点耦合电场的峰值大；
相同面积下，正方形孔、矩形孔的耦合电场比圆孔的耦合电场小；内部腔体与外部腔体
在孔缝一侧距离的大小也会对耦合结果产生影响，间距越大，内部耦合电场的衰减越多。所
得结论
有利于指导双层金属腔体的电磁防护设计。 |
| 关键词: 高空核爆电磁脉冲 平面波 时域有限差分法 孔缝 耦合 |
| DOI： |
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| 基金项目: |
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| Analysis of the Double Metal Cavities′ Aperture Coupling by HEMP Plane Wave |
| CHAI Yan-jie,SUN Ji-yin,SUN Dong-yang,HU Yan |
| (The Second Artillery Engineering College, Xi′an 710025, China;Northwest Institute of Nuclear Technology, Xi′an 710024, China;The Second Artillery Command College, Wuhan 430012, China) |
| Abstract: |
| Highaltitude electromagnetic pulse (HEMP) poses a serious threat on t
he electronic/electrical equipment, which is an important research field of el
ectromagnetic compatibility(EMC) and the security of electronic/electrical equip
men
t. Computing model is built by the total-field/scattered-field of the finite di
fference time domain method (FDTD), and 1-D plane wave method is imported in the
connecting surface. Then,the apertures′ resp
onse of double metal cavities under the HEMP plane wave is simulated and analyse
d using FDTD. The simulati
on results show that all samples are showing clear oscillatory shape, and the pe
ak electric field in aperture center of external metal cavity is larger than tha
t
of the center point of internal metal cavity. With the same aperture′s siz
e, the internal coupling electric fields of the square aperture, rectangular ape
rture are smaller than that of circular aperture. The distance of the apertur
es between internal cavity and external cavity will also affect the coupling res
ults, and the greater distance makes more attenuation of the internal coupling e
lectric field. The conclusions are able to provide guidance for the protection d
esign of double metal cavities. |
| Key words: high altitude electromagnetic pulse(HEMP) plane wave FDTD method slot coupling |
《电讯技术》编辑部 