Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
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Experimental and Numerical Study for Motion Reduction Design of Floating Wave Energy Converter

부유식 파력발전구조물의 운동 저감부 형상설계에 관한 수치 및 실험적 연구

  • Park, Ji Yong (Korea Research Institute of Ships & Ocean Engineering) ;
  • Nam, Bo Woo (Korea Research Institute of Ships & Ocean Engineering) ;
  • Hong, Sa Young (Korea Research Institute of Ships & Ocean Engineering) ;
  • Shin, Seung Ho (Korea Research Institute of Ships & Ocean Engineering)
  • 박지용 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 남보우 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 홍사영 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 신승호 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2014.01.13
  • Accepted : 2014.03.21
  • Published : 2014.05.25
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Abstract

The present study aims to design an optimized hull shape of a floating pendulum-type wave energy converter(WEC). The purpose of these structure is to improve the performance and stability of the WEC by reducing its motion under operating and survival wave conditions. In this study, motion reduction structures, like restoring and dampling plates were installed on a floating pendulum WEC that has been the subject of previous studies. Restoring plates were installed to increase the restoring force and shift the natural period to a shorter period. Damping plates were installed to shift the natural period to a longer period by increasing the added mass. The effects of the structures were then analyzed under different incident wave conditions. The design parameters for the motion reduction structures were size, shape, and installed position. The wave-induced motion characteristics and performance of the floating pendulum WEC were also investigated numerically. Based on the simulation results, we are able to optimize the motion reduction structure of the WEC, thus improving its efficiency and durability.

부유식 파력발전구조물의 운동은 발전성능과 구조물의 안정성에 중요한 영향을 미치며, 이에 구조물의 형상 최적화가 필요하다. 본 연구에서는 기존에 연구되고 있는 부유식 진자형 파력발전장치를 대상으로 운동 저감부 형상의 부가를 통해 운동응답특성을 최적화 하려 한다. 이를 위해 감쇠판을 설치하여 부가저항과 감쇠력을 변화시키고, 복원판을 설치하여 복원력을 증가시켜 구조물의 운동응답의 변화를 확인하였다. 실험을 통해 운동응답특성의 변화를 비교 검증하였으며, 수치해석을 통해 다양한 운동저감부 형상에 대해 분석하였다. 본 연구를 통해 부유식 파력발전구조물의 형상을 최적화하고 성능을 향상 시킬 수 있다.

Keywords

References

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