Integrated structural optimisation of offshore wind turbine support structures based on finite element analysis and genetic algorithm

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dc.contributor.authorGentils, Theo
dc.contributor.authorWang, Lin
dc.contributor.authorKolios, Athanasios
dc.date.accessioned2017-07-04T16:17:18Z
dc.date.available2017-07-04T16:17:18Z
dc.date.issued2017-05-09
dc.description.abstractBy accounting for almost 25% of the capital cost of an OWT (offshore wind turbine), optimisation of support structures provides an efficient way to reduce the currently high cost of offshore wind energy. In this paper, a structural optimisation model for OWT support structures has been developed based on a coupled parametric FEA (Finite Element Analysis) and GA (Genetic Algorithm), minimising the mass of the support structure under multi-criteria constraints. Contrary to existing optimisation models for OWT support structures, the proposed model is an integrated structural optimisation model, which optimises the components of the support structure (i.e. tower, transition piece, grout and monopile) simultaneously. The outer diameters and section thicknesses along the support structure are chosen as design variables. A set of constraints based on multi-criteria design assessment is applied according to standard requirements, which includes vibration, stress, deformation, buckling, fatigue and design variable constraints. The model has been applied to the NREL (National Renewable Energy Laboratory) 5 MW OWT on an 00 (Offshore Code Comparison Collaboration) monopile. The results of the application of the integrated optimisation methodology show a 19.8% reduction in the global mass of the support structure while satisfying all the design constraints. It is demonstrated that the proposed structural optimisation model is capable of effectively and accurately determining the optimal design of OWT support structures, which significantly improves their design efficiency. (C) 2017 Elsevier Ltd. All rights reserved.en_UK
dc.identifier.citationGentils T, Wang L, Kolios A. (2017) Integrated structural optimisation of offshore wind turbine support structures based on finite element analysis and genetic algorithm. Applied Energy, Volume 199, August 2017, pp. 187-204en_UK
dc.identifier.issn0306-2619
dc.identifier.urihttp://dx.doi.org/10.1016/j.apenergy.2017.05.009
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/12161
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.subjectOffshore wind turbineen_UK
dc.subjectSupport structureen_UK
dc.subjectIntegrated structural optimisationen_UK
dc.subjectMulti-criteria design assessmenten_UK
dc.subjectFinite element analysisen_UK
dc.subjectGenetic algorithmen_UK
dc.titleIntegrated structural optimisation of offshore wind turbine support structures based on finite element analysis and genetic algorithmen_UK
dc.typeArticleen_UK

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