The dynamically coupled interaction between the hull of a floating platform and its risers and tendons plays an important role in the global motions of the platform and the tension loads in the tendons and risers. This is an especially critical design issue in the frequency ranges outside the wave frequencies of significant energy content. This study examines the importance of this coupled dynamic interaction and the effectiveness of different approaches for their prediction. A numerical code, named COUPLE, has been developed for computing the motions and tensions pertaining to a moored floating structure positioned and restrained by its mooring/tendon and riser systems. In this study the experimentally measured motions of a mini-TLP (Tension Leg Platform) are compared with those computed using COUPLE and alternative predictions based upon quasi-static analysis. The comparisons confirm that COUPLE is able to predict the dynamic interaction between the hull and its tendon and riser systems while the related quasi-static analysis fails. The comparisons also show that wave loads on the mini-TLP can be accurately predicted using the Morison equation provided that the wavelength of incident waves is much longer than the diameters of the columns and pontoons and that the wave kinematics used are sufficiently accurate. Although these findings are based upon the case of a mini-TLP, they are expected to be relevant to a wide range of floating or compliant deepwater structures.


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    Titel :

    Coupled dynamic analysis of a mini TLP: Comparison with measurements


    Weitere Titelangaben:

    Berechnung der dyamischen Koppelbelastungen einer kleinen, mit Spannseilen verspannten schwimmenden Plattform: Vergleich mit Messungen


    Beteiligte:
    Chen, Xiaohong (Autor:in) / Ding, Yu (Autor:in) / Zhang, Jun (Autor:in) / Liagre, Pierre (Autor:in) / Niedzwecki, John (Autor:in) / Teigen, Per (Autor:in)

    Erschienen in:

    Ocean Engineering ; 33 , 1 ; 93-117


    Erscheinungsdatum :

    2006


    Format / Umfang :

    25 Seiten, 30 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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