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    Modeling of a Semisubmersible Floating Offshore Wind Platform in Severe Waves

    Source: Journal of Offshore Mechanics and Arctic Engineering:;2019:;volume( 141 ):;issue: 006::page 61905
    Author:
    Rivera-Arreba, Irene
    ,
    Bruinsma, Niek
    ,
    Bachynski, Erin E.
    ,
    Viré, Axelle
    ,
    Paulsen, Bo T.
    ,
    Jacobsen, Niels G.
    DOI: 10.1115/1.4043942
    Publisher: American Society of Mechanical Engineers (ASME)
    Abstract: Floating offshore wind platforms may be subjected to severe sea states, which include both steep and long waves. The hydrodynamic models used in the offshore industry are typically based on potential-flow theory and/or Morison’s equation. These methods are computationally efficient and can be applied in global dynamic analysis considering wind loads and mooring system dynamics. However, they may not capture important nonlinearities in extreme situations. The present work compares a fully nonlinear numerical wave tank (NWT), based on the viscous Navier–Stokes equations, and a second-order potential-flow model for such situations. A comparison of the NWT performance with the experimental data is first completed for a moored vertical floating cylinder. The OC5-semisubmersible floating platform is then modeled numerically both in this nonlinear NWT and using a second-order potential-flow based solver. To test both models, they are subjected to nonsteep waves and the response in heave and pitch is compared with the experimental data. More extreme conditions are examined with both models. Their comparison shows that if the structure is excited at its heave natural frequency, the dependence of the response in heave on the wave height and the viscous effects cannot be captured by the adjusted potential-flow based model. However, closer to the inertia dominated region, the two models yield similar responses in pitch and heave.
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      Modeling of a Semisubmersible Floating Offshore Wind Platform in Severe Waves

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    contributor authorRivera-Arreba, Irene
    contributor authorBruinsma, Niek
    contributor authorBachynski, Erin E.
    contributor authorViré, Axelle
    contributor authorPaulsen, Bo T.
    contributor authorJacobsen, Niels G.
    date accessioned2019-09-18T09:02:42Z
    date available2019-09-18T09:02:42Z
    date copyright6/26/2019 12:00:00 AM
    date issued2019
    identifier issn0892-7219
    identifier otheromae_141_6_061905
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4258207
    description abstractFloating offshore wind platforms may be subjected to severe sea states, which include both steep and long waves. The hydrodynamic models used in the offshore industry are typically based on potential-flow theory and/or Morison’s equation. These methods are computationally efficient and can be applied in global dynamic analysis considering wind loads and mooring system dynamics. However, they may not capture important nonlinearities in extreme situations. The present work compares a fully nonlinear numerical wave tank (NWT), based on the viscous Navier–Stokes equations, and a second-order potential-flow model for such situations. A comparison of the NWT performance with the experimental data is first completed for a moored vertical floating cylinder. The OC5-semisubmersible floating platform is then modeled numerically both in this nonlinear NWT and using a second-order potential-flow based solver. To test both models, they are subjected to nonsteep waves and the response in heave and pitch is compared with the experimental data. More extreme conditions are examined with both models. Their comparison shows that if the structure is excited at its heave natural frequency, the dependence of the response in heave on the wave height and the viscous effects cannot be captured by the adjusted potential-flow based model. However, closer to the inertia dominated region, the two models yield similar responses in pitch and heave.
    publisherAmerican Society of Mechanical Engineers (ASME)
    titleModeling of a Semisubmersible Floating Offshore Wind Platform in Severe Waves
    typeJournal Paper
    journal volume141
    journal issue6
    journal titleJournal of Offshore Mechanics and Arctic Engineering
    identifier doi10.1115/1.4043942
    journal fristpage61905
    journal lastpage061905-11
    treeJournal of Offshore Mechanics and Arctic Engineering:;2019:;volume( 141 ):;issue: 006
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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