Structural Integrity Analysis of Marine Dynamic Cables: Water Trees and FatigueSource: Journal of Offshore Mechanics and Arctic Engineering:;2024:;volume( 147 ):;issue: 003::page 31702-1Author:Ringsberg, Jonas W.
,
Li, Zhiyuan
,
McCormick, Robbie
,
Fagan, Nicholas
,
Stewart, Greg
,
Marwood, Tom
DOI: 10.1115/1.4065816Publisher: 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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contributor author | Ringsberg, Jonas W. | |
contributor author | Li, Zhiyuan | |
contributor author | McCormick, Robbie | |
contributor author | Fagan, Nicholas | |
contributor author | Stewart, Greg | |
contributor author | Marwood, Tom | |
date accessioned | 2025-04-21T09:59:49Z | |
date available | 2025-04-21T09:59:49Z | |
date copyright | 9/3/2024 12:00:00 AM | |
date issued | 2024 | |
identifier issn | 0892-7219 | |
identifier other | omae_147_3_031702.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4305273 | |
description 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. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Structural Integrity Analysis of Marine Dynamic Cables: Water Trees and Fatigue | |
type | Journal Paper | |
journal volume | 147 | |
journal issue | 3 | |
journal title | Journal of Offshore Mechanics and Arctic Engineering | |
identifier doi | 10.1115/1.4065816 | |
journal fristpage | 31702-1 | |
journal lastpage | 31702-13 | |
page | 13 | |
tree | Journal of Offshore Mechanics and Arctic Engineering:;2024:;volume( 147 ):;issue: 003 | |
contenttype | Fulltext |