This paper compares laboratory measurements of the vortex-induced vibrations of a riser in a stepped current with blind predictions obtained with 11 different numerical models. Results are included on in-line and transverse displacements and curvatures, and dominant frequencies. In general, empirical models were more successful at predicting cross-flow displacements and curvatures than current codes based on CFD. Overall ratios between predictions and measurements of cross-flow displacements were around 95 % and 75 %, respectively. Predictions of cross-flow curvatures were more scattered, and almost all were unconservative. In-line vortex-induced curvatures, which may cause as much damage as cross-flow curvatures, could not be computed by any of the empirically based codes, and in general those based on CFD were in very poor agreement with the measurements.


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    Titel :

    Blind predictions of laboratory measurements of vortex-induced vibrations of a tension riser


    Weitere Titelangaben:

    Blindvorhersagen von Labormessungen strömungsinduzierter Vibrationen einer Steigleitung


    Beteiligte:
    Chaplin, J.R. (Autor:in) / Bearman, P.W. (Autor:in) / Cheng, Y. (Autor:in) / Fontaine, E. (Autor:in) / Graham, J.M.R. (Autor:in) / Herfjord, K. (Autor:in) / Huera Huarte, F.J. (Autor:in) / Isherwood, M. (Autor:in) / Lambrakos, K. (Autor:in) / Larsen, C.M. (Autor:in)


    Erscheinungsdatum :

    2005


    Format / Umfang :

    16 Seiten, 11 Bilder, 2 Tabellen, 27 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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