地面铺设缆线的高空电磁脉冲响应研究
Research on HEMP response of ground laid cables
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摘要: 利用时域多分辨分析方法，对地面铺设缆线屏蔽层感生电流的规律进行了研究。给出了屏蔽层感生电流与缆线距离地面的高度、缆线的长度、电磁脉冲的入射方向等的关系。结果表明：屏蔽层电流幅度随着缆线距离地面高度增高而增加；屏蔽层电流幅度、前沿、半高宽随着缆线长度增加而增加，直到分别达到各自的最大值；电磁脉冲正入射时，屏蔽层电流幅度沿缆线分布呈现中间大、两边小的规律；电磁脉冲斜入射时，屏蔽层电流相对电磁脉冲正入射时，幅度更高、前沿更快、半高宽更窄，幅度沿缆线的分布情况为从一端到另一端逐渐增大。Abstract: The characteristics of current induced by HEMP on cable’s shielding layer has been researched by multiresolution analysis in time domain. There are several factors, including height from cable to ground, length of cable and direction of incident HEMP, having effect on the current. The relationship between the induced current and the factors is analyzed. The analysis shows that, the higher the height from cable to ground is, the bigger the amplitude of the induced current is. It also indicates that, the amplitude, rising time and FWHM of the induced current are increasing while the length of the cable is getting longer until they all reach their own maxima. The distribution of the induced current along the cable with normal HEMP incidence is different from that with oblique incidence, and
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Key words:
- oblique incidence /
- hemp /
- induced current /
- shielding layer /
- cable
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