Two numerical simulation models to predict large-amplitude motions of floating platforms are presented. The first method is based on the application of the relative-velocity formulation of Morison's equation for force calculations. The second method developed in this work uses the three-dimensional potential theory in time domain. In this method, both the Froude-Krylov and scattering forces are calculated by considering finite wave amplitude effects in random waves. The effect of various nonlinearities on the low-frequency motions and high-frequency tether-tension response of a tension leg platform are studied using these simulation models in conjunction with power spectral methods. The presence of current and the nonlinear drag force are observed to have a significant effect on the low-frequency motions and tether tensions.


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    Title :

    Time-domain simulation of large-amplitude response of floating platforms


    Additional title:

    Zeitabhängige Simulation des großamplitudigen Verhaltens von treibenden Plattformen


    Contributors:

    Published in:

    Ocean Engineering ; 22 , 4 ; 367-385


    Publication date :

    1995


    Size :

    19 Seiten, 10 Bilder, 33 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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