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Study on wave energy converters based on auto-parametrically excited oscillations

Research Project

Project/Area Number 17K06960
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Naval and maritime engineering
Research InstitutionTokyo University of Marine Science and Technology

Principal Investigator

ISEKI TOSHIO  東京海洋大学, 学術研究院, 教授 (70212959)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords波力発電 / 浮体動揺 / スパー型ブイ / パラメトリック励振 / マシュー方程式 / マシュー型不安定 / 浮体動揺制御
Outline of Final Research Achievements

The purpose of this research work is to improve the efficiency of wave energy converter systems by utilizing the nonlinear auto-parametrically excited oscillation called Mathieu-type instability. For the coupled motions of pitch and heave of a spar-buoy type point absorber, the kinetic energy was transferred from the heave mode to the pitch mode and used to fluctuate the restoring moment. In some experiments, it was observed that the large pitch motion occurred suddenly, and it was theoretically examined whether it could be explained as the nonlinear auto-parametrically excited oscillation based on Mathieu-type instability. Finally, in order to utilize the phenomenon for wave energy converters, the method to make the phenomenon sustainable was considered.

Academic Significance and Societal Importance of the Research Achievements

本研究課題では、波力発電システムにおける大振幅動揺の発生と消滅を時間領域で研究し、マシュー型不安定と呼ばれる非線形パラメトリック自励振動現象として理論的に説明できることに成功した。さらに、波力発電システムとして利用するために、大振幅動揺を長時間継続して発生させる制御方法開発への指針を与えた。この指針は、あらゆる浮体式波力発電装置に応用できる点で非常に優れたものであり、今後の波力発電の高効率化のみならず、再生可能エネルギー分野の発展にも大きく貢献することが期待される。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (21 results)

All 2019 2018 2017

All Journal Article (9 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (11 results) (of which Int'l Joint Research: 9 results) Book (1 results)

  • [Journal Article] Real-time estimation of the ship maneuverable range in wind2019

    • Author(s)
      Toshio Iseki
    • Journal Title

      Proceedings of 5th International Conference on Ship Manoeuvring in Shallow and Confined Water with non-exclusive focus on manoeuvring in waves, wind and current (MASHCON2019)

      Volume: Web Pages: 180-185

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Experimental Study on Coupled Motions of a Spar-Buoy Under Mathieu Instability2019

    • Author(s)
      Iseki Toshio、Xu Peng
    • Journal Title

      Proceedings of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2019)

      Volume: DVD Pages: 1-7

    • DOI

      10.1115/omae2019-95937

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The effect of short-term variability of cross-spectral analysis on wave buoy analogy2019

    • Author(s)
      Yanfei Hong, Toshio Iseki and Ulrik Dam Nielsen
    • Journal Title

      Proceedings of the Twenty-ninth (2019) International Ocean and Polar Engineering Conference (ISOPE2019)

      Volume: DVD Pages: 1311-1318

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Real-time estimation of the ship manoeuvrable range in wind2019

    • Author(s)
      Iseki Toshio
    • Journal Title

      Ocean Engineering

      Volume: 190 Pages: 106396-106396

    • DOI

      10.1016/j.oceaneng.2019.106396

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Experimental Study on Parametrically Excited Oscillation of a Spar-Buoy Under Mathieu Instability2019

    • Author(s)
      Xu Peng、Iseki Toshio
    • Journal Title

      Journal of the Japan Society of Naval Architects and Ocean Engineers

      Volume: 30 Issue: 0 Pages: 97-103

    • DOI

      10.2534/jjasnaoe.30.97

    • NAID

      130007839970

    • ISSN
      1880-3717, 1881-1760
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Experimental Study on Oscillation Characteristics Of a Spar-Buoy Under Mathieu Instability2018

    • Author(s)
      Peng Xu and Toshio Iseki
    • Journal Title

      Conference Proceedings of 3rd International Conference on Offshore Renewable-energy (CORE2018)

      Volume: Part 2 Pages: 170-178

    • Related Report
      2018 Research-status Report
  • [Journal Article] Study on Short-term Variability of Ship Responses in Waves - II. - Examination of the correlation method -2018

    • Author(s)
      Toshio Iseki and Ulrik Dam Nielsen
    • Journal Title

      日本航海学会講演予稿集

      Volume: 6巻 Pages: 176-179

    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Journal Article] Short-term Variability of Cross-Spectral Analysis for Ship Responses in Waves2018

    • Author(s)
      Yanfei Hong, Toshio Iseki, Ulrik Dam Nielsen
    • Journal Title

      Proceedings of Asia Navigation Conference 2018 (ANC2018)

      Volume: C3-3 Pages: 1-6

    • NAID

      130007617862

    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Journal Article] Experimental Study on Dynamic Control of Oscillation Characteristics of a Spar-buoy2017

    • Author(s)
      Toshio Iseki
    • Journal Title

      Proceedings of the ASME 2017 36st International Conference on Ocean, Offshore and Arctic Engineering

      Volume: OMAE2017-61612 Pages: 1-7

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Real-time estimation of the ship maneuverable range in wind2019

    • Author(s)
      Toshio Iseki
    • Organizer
      5th International Conference on Ship Manoeuvring in Shallow and Confined Water with non-exclusive focus on manoeuvring in waves, wind and current (MASHCON2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental study on coupled motions of a spar-buoy under Mathieu instability2019

    • Author(s)
      Toshio Iseki
    • Organizer
      The ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The effect of short-term variability of cross-spectral analysis on wave buoy analogy2019

    • Author(s)
      Yanfei Hong
    • Organizer
      The Twenty-ninth (2019) International Ocean and Polar Engineering Conference (ISOPE2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] xperimental Study on Auto-parametrically Excited Heaving Motion of a Spar-buoy2018

    • Author(s)
      Toshio Iseki
    • Organizer
      4th International Conference on Maritime Technology and Engineering (MARTECH2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] スパー型ブイのパラメトリック励振について2018

    • Author(s)
      徐鵬
    • Organizer
      日本船舶海洋工学会 第10 回 推進・運動性能研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] Experimental Study on Oscillation Characteristics of a Spar-buoy Under Mathieu Instability2018

    • Author(s)
      Peng Xu
    • Organizer
      3rd International Conference on Offshore Renewable-energy (CORE2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Study on Short-term Variability of Ship Responses in Waves - II. - Examination of the correlation method -2018

    • Author(s)
      Toshio Iseki
    • Organizer
      日本航海学会 第139回講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Experimental Study on Oscillation Characteristics of a Spar-buoy under Mathieu Instability2018

    • Author(s)
      Toshio Iseki
    • Organizer
      Workshop on Environment Technologies in Naval Architecture and Ocean Engineering (WETNAOE2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Short-term Variability of Cross-Spectral Analysis for Ship Responses in Waves2018

    • Author(s)
      Yanfei Hong
    • Organizer
      Asia Navigation Conference 2018 (ANC2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Experimental Study on Auto-parametrically Excited Heaving Motion of a Spar-buoy2018

    • Author(s)
      Toshio Iseki
    • Organizer
      4th International Conference on Maritime Technology and Engineering (MARTECH2018)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Experimental Study on Auto-parametrically Excited Heaving Motion of a Spar-buoy2017

    • Author(s)
      Toshio Iseki
    • Organizer
      The ASME 2017 36st International Conference on Ocean, Offshore and Arctic Engineering (OMAE2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Book] Progress in Marine Engineering and Technology2018

    • Author(s)
      Guades Soares & Santos Eds
    • Total Pages
      716
    • Publisher
      Taylor & Francis Group (London)
    • ISBN
      9781138585393
    • Related Report
      2018 Research-status Report 2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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