A new reduced-order model capable of analyzing the vortex-induced vibration of catenary riser in the ocean current has been developed. This semi analytical-numerical approach is versatile and allows for a significant reduction in computational effort for the analysis of fluid-riser interactions. The incoming current flow is assumed to be steady, uniform, unidirectional and perpendicular to the riser plane of initial equilibrium curvatures. The equations of riser 3-D motion are based on a pinned-pinned, tensioned-beam or flexural cable, modelling which accounts for overall effects of riser bending, extensibility, sag, inclination and structural nonlinearities. The unsteady hydrodynamic forces associated with cross-flow and in-line vibrations are modelled as distributed van der Pol wake oscillators. This hydrodynamic model has been modified in order to capture the effect of varying initial curvatures of the inclined flexible cylinder and to describe the space-time fluctuation of lift and drag forces. Depending on the vortex-excited in-plane/out-of-plane modes and system fluid-structure parameters, the parametric studies are carried out to determine the maximum response amplitudes of catenary risers, along with the occurrence of uni-modal lock-in phenomenon. The obtained results highlight the effect of initial curvatures and geometric nonlinearities on the nonlinear dynamics of riser undergoing vortex-induced vibration.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Reduced-order modelling of vortex-induced vibration of catenary riser


    Weitere Titelangaben:

    Mathematische Modellierung mit verringertem Grad der wirbelinduzierten Schwingungen eines Hängebrückenrisers (bogenförmig von der Bohrplattform zum Meeresgrund führende Steigleitung)


    Beteiligte:

    Erschienen in:

    Ocean Engineering ; 36 , 17-18 ; 1404-1414


    Erscheinungsdatum :

    2009


    Format / Umfang :

    11 Seiten, 33 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    New model for vortex-induced vibration of catenary riser

    Srinil, Narakorn / Wiercigroch, Marian / O'Brien, Patrick et al. | Tema Archiv | 2008


    Vortex-induced vibration of catenary riser: reduced-order modeling and lock-in analysis using wake oscillator

    Srini, Narakorn / Wiecigroch, Marian / O'Brien, Patrick et al. | Tema Archiv | 2009


    Reduced-order, nonlinear approximation of catenary riser dynamics using frequency domain identification

    Kazangas, Dimitris C / Xiros, Nikolaos I / Chatjigeorgiou, Ioannis K | SAGE Publications | 2013



    Steel catenary riser limiting device

    FANG WEI / LIANG HUI / SUN XUEMEI et al. | Europäisches Patentamt | 2021

    Freier Zugriff