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Structural Dynamic Analysis of Semi-Submersible Floating Vertical Axis Wind Turbines

Author

Listed:
  • Jeremiah Ishie

    (Department of Mechanical and Structural Engineering and Material Science, University of Stavanger, 4036 Stavanger, Norway)

  • Kai Wang

    (Aker Solutions AS, 1366 Lysaker, Norway)

  • Muk Chen Ong

    (Department of Mechanical and Structural Engineering and Material Science, University of Stavanger, 4036 Stavanger, Norway)

Abstract

The strong and stable wind at offshore locations and the increasing demand for energy have made the application of wind turbines in deeper water surge. A novel concept of a 5 MW baseline Floating Vertical Axis Wind Turbine (FVAWT) and a 5 MW optimised FVAWT with the DeepWind Darrieus rotor and the optimised DeepWind Darrieus rotor, respectively, were studied extensively. The structural responses, fatigue damages, platform global motions and mooring line dynamics of the FVAWTs were investigated comprehensively during normal operating conditions under steady wind and turbulent wind conditions, using a coupled non-linear aero-hydro-servo-elastic code (the Simo-Riflex-DMS code) which was developed by Wang et al. for modeling FVAWTs. This coupled code incorporates the models for the turbulent wind field, aerodynamics, hydrodynamics, structural dynamics, and generator controller. The simulation is performed in a fully coupled manner in time domain. The comparison of responses under different wind conditions were used to demonstrate the effect of turbulence on both FVAWTs dynamic responses. The turbulent wind condition has the advantage of reducing the 2P effects. Furthermore, comparative studies of the FVAWTs responses were undertaken to explore the advantages of adopting the optimised 5 MW DeepWind Darrieus rotor over the baseline model. The results identified the 5 MW optimised FVAWT to having: lower Fore-Aft (FA) but higher lower Side-Side (SS) bending moments of structural components; lower motions amplitude; lower short-term fatigue equivalent loads and a further reduced 2P effects.

Suggested Citation

  • Jeremiah Ishie & Kai Wang & Muk Chen Ong, 2016. "Structural Dynamic Analysis of Semi-Submersible Floating Vertical Axis Wind Turbines," Energies, MDPI, vol. 9(12), pages 1-36, December.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:12:p:1047-:d:85065
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    Citations

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    Cited by:

    1. Krzysztof Rogowski & Martin Otto Laver Hansen & Galih Bangga, 2020. "Performance Analysis of a H-Darrieus Wind Turbine for a Series of 4-Digit NACA Airfoils," Energies, MDPI, vol. 13(12), pages 1-28, June.
    2. Florin Onea & Andrés Ruiz & Eugen Rusu, 2020. "An Evaluation of the Wind Energy Resources along the Spanish Continental Nearshore," Energies, MDPI, vol. 13(15), pages 1-23, August.
    3. Hidetaka Senga & Hiroki Umemoto & Hiromichi Akimoto, 2022. "Verification of Tilt Effect on the Performance and Wake of a Vertical Axis Wind Turbine by Lifting Line Theory Simulation," Energies, MDPI, vol. 15(19), pages 1-17, September.
    4. Florin Onea & Eugen Rusu, 2019. "An Assessment of Wind Energy Potential in the Caspian Sea," Energies, MDPI, vol. 12(13), pages 1-18, July.
    5. Andrés Ruiz & Florin Onea & Eugen Rusu, 2020. "Study Concerning the Expected Dynamics of the Wind Energy Resources in the Iberian Nearshore," Energies, MDPI, vol. 13(18), pages 1-25, September.

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