Structural integrity assessment of floating offshore wind turbine support structures

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dc.contributor.authorMoghaddam, Behrooz Tafazzoli
dc.contributor.authorHamedany, Ali Mahboob
dc.contributor.authorTaylor, Jessica
dc.contributor.authorMehmanparast, Ali
dc.contributor.authorBrennan, Feargal Peter
dc.contributor.authorDavies, Catrin Mair
dc.contributor.authorNikbin, Kamran
dc.date.accessioned2020-08-03T15:22:28Z
dc.date.available2020-08-03T15:22:28Z
dc.date.issued2020-05-15
dc.description.abstractFloating offshore wind turbines are becoming more attractive to the wind industry due to their capability to operate larger turbines in deeper waters. The floating support structures are anchored to the seabed via mooring chains to impede the structure's unwanted movements. The combination of cyclic stresses and the corrosive marine environment makes the floating support structures vulnerable to corrosion pitting and subsequently fatigue crack initiation and propagation. In this study a framework is proposed to simulate fatigue crack growth from multiple corrosion pits at critical spots of the Spar-type floating support structures to examine the status of the crack during several years of operation. The proposed advanced fracture mechanics based approach provides a methodology to assess the integrity of the structure and subsequently plan for preventive or curative maintenance. The crack growth rate is examined for both singular and multiple cracks at different R ratios and for different stress levels using ABAQUS XFEM. Following numerical simulations, a sensitivity analysis is carried out using Crackwise software for different values of plate thickness, R ratio and initial crack size. The numerical results are discussed in terms of the corrosion pitting effects on fatigue life assessment of floating offshore wind turbinesen_UK
dc.identifier.citationMoghaddam BT, Hamedany AM, Taylor J, et al., (2020) Structural integrity assessment of floating offshore wind turbine support structures. Ocean Engineering, Volume 208, July 2020, Article number 107487en_UK
dc.identifier.issn0029-8018
dc.identifier.urihttps://doi.org/10.1016/j.oceaneng.2020.107487
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15629
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectDefect assessmenten_UK
dc.subjectSpar foundationen_UK
dc.subjectFloating offshore wind turbineen_UK
dc.subjectCorrosion fatigue crack growthen_UK
dc.subjectPitting corrosionen_UK
dc.titleStructural integrity assessment of floating offshore wind turbine support structuresen_UK
dc.typeArticleen_UK

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