Reliability assessment of point-absorber wave energy converters

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dc.contributor.author Kolios, Athanasios
dc.contributor.author Di Maio, Loris Francesco
dc.contributor.author Wang, Lin
dc.contributor.author Cui, Lin
dc.contributor.author Sheng, Qihu
dc.date.accessioned 2018-07-06T09:21:32Z
dc.date.available 2018-07-06T09:21:32Z
dc.date.issued 2018-06-04
dc.identifier.citation Athanasios Kolios, Loris Francesco Di Maio, Lin Wang, et al., Reliability assessment of point-absorber wave energy converters. Ocean Engineering, Volume 163, 1 September 2018, Pages 40-50 en_UK
dc.identifier.issn 0029-8018
dc.identifier.uri https://doi.org/10.1016/j.oceaneng.2018.05.048
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/13327
dc.description.abstract Ocean wave energy is a clean and inexhaustible energy resource, capable of providing more than 2 TW of energy supply worldwide. Among all the technologies available to convert wave energy, the point-absorber is one of the most promising solutions today, due to its ease of both fabrication and installation. The floaters of point-absorber WECs (wave energy converters) are generally exposed to harsh marine environments with great uncertainties in environmental loads, which make their reliability assessment quite challenging. In this work, a reliability assessment framework, which combines parametric finite element analysis (FEA) modelling, response surface modelling and reliability analysis, has been developed specifically for the floater of point-absorber WECs. An analytical model of point-absorber WECs is also developed in this work to calculate wave loads and to validate the developed FEA model. After the validation through a series of simulations, the reliability assessment framework has been applied to the NOTC (National Ocean Technology Centre) 10 kW multiple-point-absorber WEC to assess the reliability of the floater, considering the fatigue limit state (FLS). Optimisation of key design components is also performed based on reliability assessment in order to achieve target reliability. The results show that for the considered conditions, the WEC floater is prone to experience fatigue failure before the end of their nominal service life. It is demonstrated that the reliability assessment framework developed in this work is capable of accurately assessing the reliability of WECs and optimising the structure on the basis of reliability. en_UK
dc.language.iso en en_UK
dc.publisher Elsevier en_UK
dc.rights Attribution 4.0 International *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/ *
dc.subject Wave energy converters (WECs) en_UK
dc.subject Point-absorber en_UK
dc.subject Reliability analysis en_UK
dc.subject Reliability optimisation en_UK
dc.subject Parametric finite element analysis (FEA) en_UK
dc.subject Response surface modelling en_UK
dc.title Reliability assessment of point-absorber wave energy converters en_UK
dc.type Article en_UK


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