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    Ocean Currents-Induced Pipeline Lateral Stability on Sandy Seabed

    Source: Journal of Engineering Mechanics:;2007:;Volume ( 133 ):;issue: 010
    Author:
    Fu-Ping Gao
    ,
    Shuming Yan
    ,
    Bing Yang
    ,
    Yingxiang Wu
    DOI: 10.1061/(ASCE)0733-9399(2007)133:10(1086)
    Publisher: American Society of Civil Engineers
    Abstract: Unlike previous mechanical actuator loading methods, in this study, a hydrodynamic loading method was employed in a flow flume for simulating ocean currents induced submarine pipeline stability on a sandy seabed. It has been observed that, in the process of pipeline losing lateral stability in currents, there usually exist three characteristic times: (1) onset of sand scour; (2) slight lateral displacement of pipeline; and (3) breakout of pipeline. An empirical linear relationship is established between the dimensionless submerged weight of pipeline and Froude number for describing pipeline lateral stability in currents, in which the current-pipe-soil coupling effects are reflected. Scale effects are examined with the method of “modeling of models,” and the sand particle size effects on pipeline stability are also discussed. Moreover, the pipeline stability in currents is compared with that in waves, which indicates that the pipeline laid directly upon the sandy seabed is more laterally stable in currents than in waves.
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      Ocean Currents-Induced Pipeline Lateral Stability on Sandy Seabed

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/86338
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    • Journal of Engineering Mechanics

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    contributor authorFu-Ping Gao
    contributor authorShuming Yan
    contributor authorBing Yang
    contributor authorYingxiang Wu
    date accessioned2017-05-08T22:41:02Z
    date available2017-05-08T22:41:02Z
    date copyrightOctober 2007
    date issued2007
    identifier other%28asce%290733-9399%282007%29133%3A10%281086%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/86338
    description abstractUnlike previous mechanical actuator loading methods, in this study, a hydrodynamic loading method was employed in a flow flume for simulating ocean currents induced submarine pipeline stability on a sandy seabed. It has been observed that, in the process of pipeline losing lateral stability in currents, there usually exist three characteristic times: (1) onset of sand scour; (2) slight lateral displacement of pipeline; and (3) breakout of pipeline. An empirical linear relationship is established between the dimensionless submerged weight of pipeline and Froude number for describing pipeline lateral stability in currents, in which the current-pipe-soil coupling effects are reflected. Scale effects are examined with the method of “modeling of models,” and the sand particle size effects on pipeline stability are also discussed. Moreover, the pipeline stability in currents is compared with that in waves, which indicates that the pipeline laid directly upon the sandy seabed is more laterally stable in currents than in waves.
    publisherAmerican Society of Civil Engineers
    titleOcean Currents-Induced Pipeline Lateral Stability on Sandy Seabed
    typeJournal Paper
    journal volume133
    journal issue10
    journal titleJournal of Engineering Mechanics
    identifier doi10.1061/(ASCE)0733-9399(2007)133:10(1086)
    treeJournal of Engineering Mechanics:;2007:;Volume ( 133 ):;issue: 010
    contenttypeFulltext
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