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  • Experimental study of vortex-induced vibrations of a pipeline near an erodible sandy seabed

    Author(s)
    Yang, Bing
    Gao, Fu-Ping
    Jeng, Dong-Sheng
    Wu, Ying-Xiang
    Griffith University Author(s)
    Jeng, Dong-Sheng
    Year published
    2008
    Metadata
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    Abstract
    Based on similarity analyses, a series of experiments have been conducted with a newly established hydro-elastic facility to investigate the transverse vortex-induced vibrations (VIVs) of a submarine pipeline near an erodible sandy seabed under the influence of ocean currents. Typical characteristics of coupling processes between pipe vibration and soil scour in the currents have been summarized for Case I: pipe is laid above seabed and Case II: pipe is partially embedded in seabed on the basis of the experimental observations. Pipe vibration and the corresponding local scour are usually two coupled physical processes leading ...
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    Based on similarity analyses, a series of experiments have been conducted with a newly established hydro-elastic facility to investigate the transverse vortex-induced vibrations (VIVs) of a submarine pipeline near an erodible sandy seabed under the influence of ocean currents. Typical characteristics of coupling processes between pipe vibration and soil scour in the currents have been summarized for Case I: pipe is laid above seabed and Case II: pipe is partially embedded in seabed on the basis of the experimental observations. Pipe vibration and the corresponding local scour are usually two coupled physical processes leading to an equilibrium state. The influence of initial gap-to-diameter ratio (e0/D) on the interaction between pipe vibration and local scour has been studied. Experimental results show that the critical values of Vr for the initiation of VIVs of the pipe near an erodible sand bed get bigger with decreasing initial gap-to-diameter ratio within the examined range of e0/D (−0.25<e0/D<0.75). The comparison of the pipe vibrations near an erodible soil with those near a rigid boundary and under wall-free conditions indicates that the vibration amplitudes of the pipe near an erodible sand bed are close to the curve fit under wall-free conditions; nevertheless, for the same stability parameter, the maximum amplitudes for the VIV coupled with local scour increase with the increase of initial gap-to-diameter ratio.
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    Journal Title
    Ocean Engineering
    Volume
    35
    DOI
    https://doi.org/10.1016/j.oceaneng.2007.11.001
    Subject
    Civil Geotechnical Engineering
    Oceanography
    Civil Engineering
    Maritime Engineering
    Publication URI
    http://hdl.handle.net/10072/63168
    Collection
    • Journal articles

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