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dc.contributor.authorSethuraman, Latha
dc.contributor.authorXing, Yihan
dc.contributor.authorVenugopal, Vengatesan
dc.contributor.authorGao, Zhen
dc.contributor.authorMueller, Markus
dc.contributor.authorMoan, Torgeir
dc.date.accessioned2017-10-31T12:43:02Z
dc.date.available2017-10-31T12:43:02Z
dc.date.created2016-01-06T11:17:33Z
dc.date.issued2017
dc.identifier.citationProceedings of the Institution of mechanical engineers. Part C, journal of mechanical engineering science. 2017, 231 (4), 744-763.nb_NO
dc.identifier.issn0954-4062
dc.identifier.urihttp://hdl.handle.net/11250/2463193
dc.description.abstractThis article proceeds with investigations on a 5 MW direct-drive floating wind turbine system (FWTDD) that was developed in a previous study. A fully integrated land-based direct-drive wind turbine system (WTDD) was created using SIMPACK, a multi-body simulation tool, to model the necessary response variables. The comparison of blade pitch control action and torque behaviour with a similar land-based direct-drive model in HAWC2 (an aero-elastic simulation tool) confirmed that the dynamic feedback effects can be ignored. The main shaft displacements, air-gap eccentricity, forces due to unbalanced magnetic pull (UMP) and the main bearing loads were identified as the main response variables. The investigations then proceed with a two-step de-coupled approach for the detailed drive-train analysis in WTDD and FWTDD systems. The global motion responses and drive-train loads were extracted from HAWC2 and fed to stand-alone direct-drive generator models in SIMPACK. The main response variables of WTDD and FWTDD system were compared. The FWTDD drive-train was observed to endure additional excitations at wave and platform pitch frequencies, thereby increasing the axial components of loads and displacements. If secondary deflections are not considered, the FWTDD system did not result in any exceptional increases to eccentricity and UMP with the generator design tolerances being fairly preserved. The bearing loading behaviour was comparable between both the systems, with the exception of axial loads and tilting moments attributed to additional excitations in the FWTDD system.nb_NO
dc.language.isoengnb_NO
dc.publisherSAGE Publicationsnb_NO
dc.titleA 5MW direct-drive generator for floating spar-buoy wind turbine: Drive-train dynamicsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber744-763nb_NO
dc.source.volume231nb_NO
dc.source.journalProceedings of the Institution of mechanical engineers. Part C, journal of mechanical engineering sciencenb_NO
dc.source.issue4nb_NO
dc.identifier.doi10.1177/0954406215623306
dc.identifier.cristin1306864
dc.relation.projectNorges forskningsråd: 193823nb_NO
dc.relation.projectNorges forskningsråd: 223254nb_NO
dc.description.localcode© 2015. This is the authors' accepted and refereed manuscript to the article.nb_NO
cristin.unitcode194,64,20,0
cristin.unitnameInstitutt for marin teknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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