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    Coupled Surge-Heave-Pitch Dynamic Modeling of Spar-Moonpool-Riser Interaction

    Source: Journal of Offshore Mechanics and Arctic Engineering:;2011:;volume( 133 ):;issue: 002::page 21301
    Author:
    Pol D. Spanos
    ,
    Vincenzo Nava
    ,
    Felice Arena
    DOI: 10.1115/1.4001956
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Due to the rather intense ongoing development of deep water gas and oil fields, the technical community has devoted considerable attention to the dynamic behavior of Spar floating systems. Spar dynamics exhibits a highly nonlinear behavior due to the presence of various components such as mooring lines, moonpool, and risers. Certain studies have focused on the reduction of the heave response of single-degree-of-freedom Spar models due to the oscillations of water entrapped in the moonpool through the partially closed bottom plates. In this paper, a novel coupled six-degree-of-freedom analytical model of a Spar system comprising top tensioned risers is proposed. The model accounts for the interactions among the Spar hull kinematics (heave, surge, and pitch), the riser kinematics (heave and surge), and the moonpool. This model involves six coupled differential equations comprising nonlinearities associated not only with stiffness and damping but also with inertia terms. A dynamic analysis is performed by subjecting the model to JONSWAP ocean wave spectrum compatible extreme forces (corresponding to the 100 year wave) and to moments applied to the center of gravity computed by means of a standard motion simulation program. Both numerical and analytical techniques (statistical linearization including inertia terms) are used for the determination of the response of the proposed dynamic model, both in the time and the frequency domains. Related parameter study results are reported, including ones pertaining to the dependence of the Spar system motion on the degree of opening of the bottom plates.
    keyword(s): Force , Pipeline risers , Spar platforms , Surges , Water , Equations , Motion , Spectra (Spectroscopy) , Damping , Hull , Mooring AND Dynamic modeling ,
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      Coupled Surge-Heave-Pitch Dynamic Modeling of Spar-Moonpool-Riser Interaction

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/147383
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    • Journal of Offshore Mechanics and Arctic Engineering

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    contributor authorPol D. Spanos
    contributor authorVincenzo Nava
    contributor authorFelice Arena
    date accessioned2017-05-09T00:46:29Z
    date available2017-05-09T00:46:29Z
    date copyrightMay, 2011
    date issued2011
    identifier issn0892-7219
    identifier otherJMOEEX-28375#021301_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/147383
    description abstractDue to the rather intense ongoing development of deep water gas and oil fields, the technical community has devoted considerable attention to the dynamic behavior of Spar floating systems. Spar dynamics exhibits a highly nonlinear behavior due to the presence of various components such as mooring lines, moonpool, and risers. Certain studies have focused on the reduction of the heave response of single-degree-of-freedom Spar models due to the oscillations of water entrapped in the moonpool through the partially closed bottom plates. In this paper, a novel coupled six-degree-of-freedom analytical model of a Spar system comprising top tensioned risers is proposed. The model accounts for the interactions among the Spar hull kinematics (heave, surge, and pitch), the riser kinematics (heave and surge), and the moonpool. This model involves six coupled differential equations comprising nonlinearities associated not only with stiffness and damping but also with inertia terms. A dynamic analysis is performed by subjecting the model to JONSWAP ocean wave spectrum compatible extreme forces (corresponding to the 100 year wave) and to moments applied to the center of gravity computed by means of a standard motion simulation program. Both numerical and analytical techniques (statistical linearization including inertia terms) are used for the determination of the response of the proposed dynamic model, both in the time and the frequency domains. Related parameter study results are reported, including ones pertaining to the dependence of the Spar system motion on the degree of opening of the bottom plates.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleCoupled Surge-Heave-Pitch Dynamic Modeling of Spar-Moonpool-Riser Interaction
    typeJournal Paper
    journal volume133
    journal issue2
    journal titleJournal of Offshore Mechanics and Arctic Engineering
    identifier doi10.1115/1.4001956
    journal fristpage21301
    identifier eissn1528-896X
    keywordsForce
    keywordsPipeline risers
    keywordsSpar platforms
    keywordsSurges
    keywordsWater
    keywordsEquations
    keywordsMotion
    keywordsSpectra (Spectroscopy)
    keywordsDamping
    keywordsHull
    keywordsMooring AND Dynamic modeling
    treeJournal of Offshore Mechanics and Arctic Engineering:;2011:;volume( 133 ):;issue: 002
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian