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    Structural Integrity Analysis of Marine Dynamic Cables: Water Trees and Fatigue

    Source: Journal of Offshore Mechanics and Arctic Engineering:;2024:;volume( 147 ):;issue: 003::page 31702-1
    Author:
    Ringsberg, Jonas W.
    ,
    Li, Zhiyuan
    ,
    McCormick, Robbie
    ,
    Fagan, Nicholas
    ,
    Stewart, Greg
    ,
    Marwood, Tom
    DOI: 10.1115/1.4065816
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Offshore power cables are typically designed to have a service life of around 25 years. A pattern is emerging where these cables only last 10 years or even as little as two. The main consensus as to why the service life is so short is due to a combination of fatigue and fretting/wear damages of the copper conductors and water treeing in the insulation material. This study presents a method that can be used to analyze the structural integrity of dynamic subsea power cables and estimate their service life determined by the factors above. The numerical simulation models developed and used to carry out global and local fatigue analyses of dynamic subsea power cables are presented, together with methods and models for assessing fretting, wear, and growth of water tree defects. A methodology for structural integrity assessment that includes all these factors is proposed. A dynamic subsea power cable connected to a wave energy converter is used as the case study for comparison of the service life when these factors are considered compared to when, e.g., the growth of water trees is excluded. A numerical sensitivity analysis demonstrates that the value of the seawater's electrical conductivity and the insulation material's threshold stress-intensity factor greatly influence the cable's service life.
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      Structural Integrity Analysis of Marine Dynamic Cables: Water Trees and Fatigue

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4305273
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    • Journal of Offshore Mechanics and Arctic Engineering

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    contributor authorRingsberg, Jonas W.
    contributor authorLi, Zhiyuan
    contributor authorMcCormick, Robbie
    contributor authorFagan, Nicholas
    contributor authorStewart, Greg
    contributor authorMarwood, Tom
    date accessioned2025-04-21T09:59:49Z
    date available2025-04-21T09:59:49Z
    date copyright9/3/2024 12:00:00 AM
    date issued2024
    identifier issn0892-7219
    identifier otheromae_147_3_031702.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4305273
    description abstractOffshore power cables are typically designed to have a service life of around 25 years. A pattern is emerging where these cables only last 10 years or even as little as two. The main consensus as to why the service life is so short is due to a combination of fatigue and fretting/wear damages of the copper conductors and water treeing in the insulation material. This study presents a method that can be used to analyze the structural integrity of dynamic subsea power cables and estimate their service life determined by the factors above. The numerical simulation models developed and used to carry out global and local fatigue analyses of dynamic subsea power cables are presented, together with methods and models for assessing fretting, wear, and growth of water tree defects. A methodology for structural integrity assessment that includes all these factors is proposed. A dynamic subsea power cable connected to a wave energy converter is used as the case study for comparison of the service life when these factors are considered compared to when, e.g., the growth of water trees is excluded. A numerical sensitivity analysis demonstrates that the value of the seawater's electrical conductivity and the insulation material's threshold stress-intensity factor greatly influence the cable's service life.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleStructural Integrity Analysis of Marine Dynamic Cables: Water Trees and Fatigue
    typeJournal Paper
    journal volume147
    journal issue3
    journal titleJournal of Offshore Mechanics and Arctic Engineering
    identifier doi10.1115/1.4065816
    journal fristpage31702-1
    journal lastpage31702-13
    page13
    treeJournal of Offshore Mechanics and Arctic Engineering:;2024:;volume( 147 ):;issue: 003
    contenttypeFulltext
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