Pipelines located on the decks of FPSO (Floating Production Storage and Offloading) systems are exposed to damage due to sea wave induced random loading. In this context, a methodology for estimating the fatigue life of fluid-conveying pipelines is presented. The pipeline is subjected to a random support motion that simulates the effect of the FPSO heaving. The equation of motion of the pipeline is derived by assuming small amplitude displacements, modeling the empty pipeline as a Bernoulli-Euler beam, and adopting the so-called 'plug-flow' approximation for the fluid. Random vibration analysis is carried out by the Galerkin method selecting as basis functions the natural modes of a beam with the same boundary conditions as the pipeline. The discretized equations of motion are used in conjunction with linear random vibration theory to compute the stress spectrum for a generic section of the pipeline. For this purpose, the power spectrum of the acceleration at the deck level is determined by using the Response Amplitude Operator of the FPSO hull. Finally, the computed stress spectrum is used to estimate the pipeline fatigue life employing an appropriate S-N fatigue curve of the material. An illustrative example concerning a pipeline simply supported at both ends is included in the paper.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A method for fatigue analysis of piping systems on topsides of FPSO structures


    Additional title:

    Verfahren für die Ermüdungsanalyse von Rohrleitungssystemen auf den Oberdecks von Offshore-Produktions-, Lager- und Ablade-Einheiten


    Contributors:
    Spanos, P.D. (author) / Sofi, A. (author) / Wang, Juan (author) / Peng, Berry (author)


    Publication date :

    2006


    Size :

    7 Seiten, 21 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    The Effect of Ship Motions on FPSO Topsides Design

    Lapidaire, P. J. M. / De Leeuw, P. J. | British Library Conference Proceedings | 1996


    HORIZONTAL STOP BEARING OF FPSO TOPSIDES AND CONNECTION METHODE THEREOF

    SIN BONG YOUNG | European Patent Office | 2016

    Free access

    OTC 12948 Integrated Risk Based Design of FPSO Topsides, Structural and Marine Systems

    Wolford, A. J. / Lin, J. C. / Liming, J. K. et al. | British Library Conference Proceedings | 2001



    A structural weight estimation model of FPSO topsides using an improved genetic programming method

    Ha, Sol / Um, Tae-Sub / Roh, Myung-Il et al. | Taylor & Francis Verlag | 2017