International Journal of Naval Architecture and Ocean Engineering

  • 제13권1호
  • /
  • Pages.86-101
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  • 2021
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  • 2092-6782(pISSN)
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  • 2092-6790(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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The effects of geometrical buoy shape with nonlinear Froude-Krylov force on a heaving buoy point absorber

  • Kim, Sung-Jae (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Koo, Weoncheol (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Kim, Moo-Hyun (Department of Ocean Engineering, Texas A&M University)
  • 투고 : 2020.08.04
  • 심사 : 2021.01.27
  • 발행 : 2021.11.30
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초록

This study examined the effects of buoy shape and Nonlinear Froude-Krylov force (NFK) on a heaving-buoy-type Wave Energy Converter (WEC). Based on the Maclaurin expansion, the theoretical solutions of the NFK were derived for three different buoy shapes; hemispheric buoy, circular vertical cylinder, and truncated conical cylinder. A hydraulic power take-off system was adopted, and the latching control strategy was applied to maximize the extracted power from the WEC. The nonlinear effects of the Froude-Krylov force and restoring force on the heaving point absorber were investigated by comparing the heave Response Amplitude Operator (RAO) and time-averaged power extraction. The results showed that the conventional linear analyses were overestimated by up to 50% under the high amplitude wave condition. The latching control strategy was the most effective when peak wave period of regular or irregular wave was 0.4-0.45 times the heave natural period of the buoy.

키워드

과제정보

This research was supported by the MOTIE (Ministry of Trade, Industry, and Energy) in Korea, under the Fostering Global Talents for Innovative Growth Program (P0008750) supervised by the Korea Institute for Advancement of Technology (KIAT). This research was also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF-2018R1D1A1B07040677 and 2018R1A6A3A01013558).

참고문헌

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피인용 문헌

  1. Cross Product and Partitioned Filtering-Based Graham Convex Hull for Buoy Drifting Area Demarcating vol.2021, 2021, https://doi.org/10.1155/2021/7713884