This paper presents a new theoretical model capable of predicting the vortex-induced vibration response of a steel catenary riser subject to a steady uniform current. The equations governing riser in-plane/out-of-plane (cross-flow/in-line) motion are based on a pinned beam-cable model accounting for overall effects of bending, extensibility, sag, inclination and structural non-linearities. The empirically hydrodynamic model is based on nonlinear wake oscillators describing the fluctuating lift/drag forces. Depending on the potentially vortex-induced modes and system parameters, a reduced-order fluid-structure interaction model is derived which entails a significantly reduced computational time effort. Parametric results reveal maximum response amplitudes of risers, along with the occurrence of uni-modal lock-in phenomenon.


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    Title :

    New model for vortex-induced vibration of catenary riser


    Additional title:

    Ein neues Modell für wirbelinduzierte Vibrationen eines Steigrohres


    Contributors:


    Publication date :

    2008


    Size :

    8 Seiten, 23 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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