| 引用本文： |
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柴焱杰,孙继银,王佰年,等.垂直入射HEMP近地面电磁环境特性研究[J].电讯技术，2011，51（1）： - . [点击复制]
- CHAI Yan-jie,SUN Ji-yin,WANG Bai-nian,et al.Study on Environment Characteristics near the Ground of Normal Incidence High altitude Electromagnetic Pulse[J].，2011，51（1）： - . [点击复制]
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| 摘要: |
| 高空核爆电磁脉冲（HEMP）具有覆盖范围广、峰值场强高等特点，对电子设备构成
严重威胁。针对有关HEMP标准中主要涉及自由空间HEMP波形描述的情况，研究了双指数
HEMP平面波垂直入射地面时，地面附近的电磁脉冲环境特性。基于时域有限差分（FDTD）法
提出使用一维合成平面波解决总场空间激励源的引入问题。通过设置不同的入射波状态和环
境因素，仿真计算了HEMP在地面附近的电磁脉冲环境参数，并对HEMP在地面附近的传播特点
与规律进行了总结和归纳。结果表明，较低位置处反射场削弱了部分入射场，使总场幅度降
低；较高位置处经历较为完整的入射场和反射场的冲击；地表介质的电气参数对总场也有影
响，其中电导率的影响较大。这些结论有利于指导地面附近电子设备的防护设计。 |
| 关键词: 高空核爆电磁脉冲 地面 电磁脉冲环境 时域有限差分法 电
子设备 防护设计 |
| DOI： |
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| 基金项目: |
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| Study on Environment Characteristics near the Ground of Normal Incidence High altitude Electromagnetic Pulse |
| CHAI Yan-jie,SUN Ji-yin,WANG Bai-nian,SUN Dong-yang |
| (The Second Artillery Engineering College,Xi′an 710025,China;Northwest I
nstitute of Nuclear Technology,Xi′an 710024,China) |
| Abstract: |
| Highaltitude electromagnetic pulse (HEMP) has the characteristics of
a wide coverage and high peak field strength, which poses a serious threat to th
e electronic devices. But the current HEMP standards include only the general wa
ve characteristics in the free space, so the electromagnetic environmental chara
cteristics near the ground induced by the doubleexponential HEMP incident plan
e
wave perpendicular to the ground are studied in this paper. Based on the finite
difference time domain(FDTD) method, the 1-D compound plane wave is proposed, wh
ich so
lves the introduction of stimulating source. The different incident wave statuse
s and environmental factors are set and the electromagnetic environmental parame
ters near the ground are simulated. Then, the propagation characteristics and tr
e
nds of the HEMP near the ground are summarized and concluded. The results show
that the reflected field weakens the incident one, which makes the total field d
epressed, especially in the lower position over the ground,and almost integer in
cid
ent and reflected fields occur in the upper position. In addition, the ground el
ectrical parameters also affect the total field near the ground, especially the
conductivity. The conclusions are helpful to provide guidance for the protection
design of electronic devices near the ground. |
| Key words: high altitude electromagnetic pulse(HEMP) ground plane environment of electro
magnet
ic pulse finite difference time domain(FDTD) method electronic device protection
design |
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