한국전자파학회논문지 (The Journal of Korean Institute of Electromagnetic Engineering and Science)

  • 제23권3호
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  • Pages.392-401
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  • 2012
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  • 1226-3133(pISSN)
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  • 2288-226X(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
권호 표지
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다층 지하 구조물로의 고고도 전자기파(HEMP) 커플링 현상에 대한 전자기적 모델링

Electromagnetic Modeling of High Altitude Electromagnetic Pulse Coupling into Large-Scale Underground Multilayer Structures

  • 강희도 (연세대학교 전기전자공학과) ;
  • 오일영 (연세대학교 전기전자공학과) ;
  • 김정호 (LIG 넥스원 전자전 연구센터) ;
  • 육종관 (연세대학교 전기전자공학과)
  • Kang, Hee-Do (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Oh, Il-Young (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Jung-Ho (Electronic Warfare R&D Lab., LIG NEX1) ;
  • Yook, Jong-Gwan (Department of Electrical and Electronic Engineering, Yonsei University)
  • 투고 : 2011.11.25
  • 심사 : 2012.02.13
  • 발행 : 2012.03.31
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초록

본 논문에서는 다층 지하 구조물로의 고고도 전자기파(high altitude electromagnetic pulse: HEMP)의 커플링 현상을 분석하였다. 이를 위하여, 고고도 전자기파에 대한 모델링을 통하여, 고고도 전자기파의 스펙트럼이 100 MHz 이상의 대역에서 -30 dB 이하로 급격히 감소함을 확인하였다. 또한, 고고도 전자기파의 커플링 영역인 다층 지하 구조물은 지구의 표면과 내부를 구성하는 5층 구조물로 가정하여, 본 구조물을 구성하는 물질의 전파 상수(propagation constant)를 바탕으로 투과 현상을 분석하였다. 그 결과, 50 kV/m의 평면파를 입사시켰을 때, 지상에서 100 m 깊이에 위치한 지하 터널에서 0.1 MHz와 1 MHz의 평면파에 대하여 각각 약 10 kV/m와 5 kV/m의 투과 현상이 발생함을 확인하였다. 투과된 전기장의 효과적인 차폐 효과 확보를 위하여 토양층의 감쇠 상수(attenuation constant)를 이용한 자연 차폐 방법과 금속 격자 구조물의 필터링(filtering) 현상을 이용한 차폐 방법을 통하여 각각 최대 20 dB와 90 dB의 차폐 효과를 얻을 수 있음을 분석하였다.

This paper gives a electromagnetic coupling mechanism of the high altitude electromagnetic pulse (HEMP) into large- scale underground multilayer structures using analytic and numerical methods. The modeling methods are firstly addressed to the HEMP source which can be generated by intentional nuclear explosion. The instantaneous and intense electromagnetic pulse of the HEMP source is concerned from DC to 100 MHz band, because the power spectrum of the HEMP is rapidly decreased under -30 dB over the 100 MHz band. Through this range, a penetrated electric field distribution is computed within the large-scale underground multilayer structures. As a result, the penetrated electric field intensities at 0.1 and 1 MHz are about 10 and 5 kV/m, respectively. Therefore, additional shielding techniques are introduced to protect buried structures within the large-scale underground structures such as high-lossy material and filtering structures (wire screen).

키워드

참고문헌

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피인용 문헌

  1. Analysis of Penetration Phenomenon of High Altitude Electromagnetic Pulse into Buried Facilities with Various Moisture Content and Depth vol.24, pp.6, 2013, https://doi.org/10.5515/KJKIEES.2013.24.6.644
  2. Analysis of Shielding Effectiveness of Reinforced Concrete Against High-Altitude Electromagnetic Pulse vol.56, pp.6, 2014, https://doi.org/10.1109/TEMC.2014.2322911
  3. Study on Wideband Shielding Effects of Simple Building Structures Using FDTD Method vol.24, pp.7, 2013, https://doi.org/10.5515/KJKIEES.2013.24.7.748
  4. HEMP Effect Analysis for Equipment Using Comparison of Norms between HEMP Filter Residual Current and Conducted Susceptibility Criteria vol.25, pp.2, 2014, https://doi.org/10.5515/KJKIEES.2014.25.2.199
  5. Electromagnetic Wave Shielding Effectiveness Measurement Method of EMP Protection Facility vol.25, pp.5, 2014, https://doi.org/10.5515/KJKIEES.2014.25.5.548
  6. Analytic and Numerical Modeling of Normal Penetration of Early-Time (E1) High Altitude Electromagnetic Pulse (HEMP) into Dispersive Underground Multilayer Structures vol.E96.B, pp.10, 2013, https://doi.org/10.1587/transcom.E96.B.2625
  7. Modified Sheet Inductance of Wire Mesh Using Effective Wire Spacing vol.58, pp.3, 2016, https://doi.org/10.1109/TEMC.2015.2502603