한국해안·해양공학회논문집 (Journal of Korean Society of Coastal and Ocean Engineers)

  • 제32권6호
  • /
  • Pages.481-495
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  • 2020
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  • 1976-8192(pISSN)
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  • 2288-2227(eISSN)
한국해안·해양공학회 (Korean Society of Coastal and Ocean Engineers)
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공진장치에 의한 지진해일파의 제어에 관한 수치시뮬레이션(I) (임원항과 묵호항에 대해)

Numerical Simulation on Control of Tsunami by Resonator (I) (for Imwon and Mukho ports)

  • 이광호 (가톨릭관동대학교 토목공학과) ;
  • 전종혁 (일본 나고야대학 대학원 환경학연구과) ;
  • 김도삼 (한국해양대학교 건설공학과) ;
  • 이윤두 (부산광역시 건설안전시험사업소 도로보수팀)
  • Lee, Kwang-Ho (Dept. of Civil Eng., Catholic Kwandong University) ;
  • Jeon, Jong-Hyeok (Graduate School of Environmental Studies, Nagoya University) ;
  • Kim, Do-Sam (Dept. of Civil Eng., Korea Maritime and Ocean Univ.) ;
  • Lee, Yun-Du (Road Maintenance Team, Construction Safety Test Office, Busan Metropolitan City)
  • 투고 : 2020.11.20
  • 심사 : 2020.12.15
  • 발행 : 2020.12.31
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초록

항내로 침입하는 특정 주파수대의 파랑을 제어할 목적으로 파랑필터이론에 근거한 공진장치가 고안된 이후, 선박의 장주기운동을 제어하기 위하여 미국 Long Beach 항 J-부두와 이탈리아 로마 요트항 등지의 실해역에 공진장치가 적용된 사례가 보고되어 있다. 최근, 초장주기파 혹은 고립파로 근사된 지진해일파의 제어에 관한 공진장치의 유용성과 적용성은 확인되어 있지만, 실해역에서의 지진해일파를 대상으로 한 검토는 보고된 사례가 없다. 본 연구에서는 우리나라 동해안에 위치한 묵호항과 임원항에 기개발된 형상의 공진장치를 적용하여 1983년 동해중부지진해일과 1993년 북해도남서외해지진해일의 작용 하에 항내에서 지진해일고의 저감율을 COMCOT 모델에 의한 수치해석으로부터 검토하였다. 결과에 따르면 묵호항에서는 최대 40%~50% 정도, 임원항에서는 최대 21% 정도의 저감율을 각각 나타내었으며, 이로부터 실해역의 지진해일파에 대해서도 공진장치의 유용성을 확인할 수 있었다. 또한, 최적의 공진장치를 얻기 위해서는 현장 여건 등을 고려하여 공진장치의 형상, 배치 및 크기에 관해 다각도로 검토될 필요가 있는 것으로 판단된다.

After the resonator on the basis of the wave-filter theory was designed to control the waves with a specific frequency range surging into the harbor, the several case with the use of resonator have been reported in some part of sea, including the port of Long Beach, USA, and yacht harbor at Rome, Italy in order to control the long-period wave motion from the vessels. Recently, the utility and applicability of the resonator has been sufficiently verified in respect of the control of tsunami approximated as the solitary wave and/or the super long-period waves. However, the case with the application of tsunami in the real sea have not been reported yet. In this research, the respective case with the use of existing resonator at the port of Mukho and Imwon located in the eastern coast of South Korea were studied by using the numerical analysis through the COMCOT model adapting the reduction rate of 1983 Central East Sea tsunami and 1993 Hokkaido Southwest off tsunami. Consequently, the effectiveness of resonator against tsunami in the real sea was confirmed through the reduction rate of maximum 40~50% at the port of Mukho, and maximum 21% at the port of Imwom, respectively. In addition, it was concluded that it is necessary to study about the various case with application of different shape, arrangement, and size of resonator in order to design the optimal resonator considering the site condition.

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참고문헌

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