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

  • 제30권4호
  • /
  • Pages.180-190
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  • 2018
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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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횡 방향으로 운동하는 투과성 진자판을 이용한 파랑에너지 차단과 추출

Block and Extraction of Wave Energy Using a Rolling Porous Pendulum Plate

  • 조일형 (제주대학교 해양시스템공학과)
  • Cho, Il-Hyoung (Department of Ocean System Engineering, Jeju National University)
  • 투고 : 2018.07.05
  • 심사 : 2018.08.20
  • 발행 : 2018.08.31
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초록

파랑 중 횡 방향으로 운동하는 투과성 진자판을 파랑에너지를 차단과 추출을 동시에 하는 복합 시스템으로 활용하는 기초 연구를 수행하였다. Porter and Evans(1995)가 제안한 Galerkin 방법을 사용하여 투과성 진자판에 대한 회절과 방사 문제를 풀어 반사율과 투과율, 운동변위, 그리고 추출파워를 구하였다. Galerkin 방법은 고유함수전개법 보다 수렴성이 좋기 때문에 짧은 계산시간에도 불구하고 정확한 해를 주었다. 투과성 진자판이 불투과성 진자판 보다 파랑에너지 추출과 차단 측면에서 모두 효과적이라고 말할 수는 없지만 파랑 하중을 줄일 수 있고 해수 교환이 가능하다는 장점은 지니고 있다.

The preliminary study was carried out to utilize the rolling porous pendulum plate as a hybrid system combining blocking and extracting of wave energy. The Galerkin method suggested by Porter and Evans (1995) was used to solve the diffraction and radiation problems to obtain reflection and transmission coefficient, roll displacement, extracted power. The Galerkin method provides better convergence than the matched eigenfunction expansion method (MEEM), which improves the accuracy of the analytical solution even if the CPU time is shorter. The porous plate can not be said to be more effective than the impermeable plate in terms of wave energy extraction and wave blocking, but it has the advantage of reducing the wave load and exchanging seawater.

키워드

참고문헌

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