Tripod-supported offshore wind turbines: Modal and coupled analysis and a parametric study using X-SEA and FAST

Show simple item record Plodpradit, Pasin Dinh, Duc V. Kim, Ki-Du 2019-11-20T05:47:59Z 2019-11-20T05:47:59Z 2019-06-09
dc.identifier.citation Plodpradit, P., Dinh, V.N. and Kim, K.D., 2019. Tripod-Supported Offshore Wind Turbines: Modal and Coupled Analysis and a Parametric Study Using X-SEA and FAST. Journal of Marine Science and Engineering, 7(6), (181). DOI:10.3390/jmse7060181 en
dc.identifier.volume 7 en
dc.identifier.issued 6 en
dc.identifier.startpage 1 en
dc.identifier.endpage 20 en
dc.identifier.doi 10.3390/jmse7060181 en
dc.description.abstract This paper presents theoretical aspects and an extensive numerical study of the coupled analysis of tripod support structures for offshore wind turbines (OWTs) by using X-SEA and FAST v8 programs. In a number of site conditions such as extreme and longer period waves, fast installation, and lighter foundations, tripod structures are more advantageous than monopile and jacket structures. In the implemented dynamic coupled analysis, the sub-structural module in FAST was replaced by the X-SEA offshore substructure analysis component. The time-histories of the reaction forces and the turbine loads were then calculated. The results obtained from X-SEA and from FAST were in good agreement. The pile-soil-structure interaction (PSSI) was included for reliable evaluation of OWT structural systems. The superelement concept was introduced to reduce the computational time. Modal, coupled and uncoupled analyses of the NREL 5MW OWT-tripod support structure including PSSI were carried out and the discussions on the natural frequencies, mode shapes and resulted displacements are presented. Compared to the uncoupled models, the physical interaction between the tower and the support structure in the coupled models resulted in smaller responses. Compared to the fixed support structures, i.e., when PSSI is not included, the piled-support structure has lower natural frequencies and larger responses attributed to its actual flexibility. The models using pile superelements are computationally efficient and give results that are identical to the common finite element models. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher MDPI en
dc.rights © 2019 by the authors. Licensee MDPI, Basel, Switzerland en
dc.rights.uri en
dc.subject Offshore wind turbine en
dc.subject Tripod support structures en
dc.subject Coupled analysis en
dc.subject Uncoupled analysis en
dc.subject Soil-pile-structure interaction en
dc.subject Superelement en
dc.title Tripod-supported offshore wind turbines: Modal and coupled analysis and a parametric study using X-SEA and FAST en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Van Nguyen Dinh, MaREI Centre, Enviromental Research Institute, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder Konkuk University, Seoul, Korea. en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Marine Science and Engineering en
dc.internal.IRISemailaddress en
dc.identifier.articleid 181 en
dc.identifier.eissn 2077-1312

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© 2019 by the authors. Licensee MDPI, Basel, Switzerland Except where otherwise noted, this item's license is described as © 2019 by the authors. Licensee MDPI, Basel, Switzerland
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