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dc.contributor.authorTetu, Amelie
dc.contributor.authorFerri, Francesco
dc.contributor.authorKramer, Morten Bech
dc.contributor.authorHals Todalshaug, Jørgen
dc.date.accessioned2019-09-02T14:01:39Z
dc.date.available2019-09-02T14:01:39Z
dc.date.created2018-10-20T13:36:14Z
dc.date.issued2018
dc.identifier.citationEnergies. 2018, 11 (9), 1-23.nb_NO
dc.identifier.issn1996-1073
dc.identifier.urihttp://hdl.handle.net/11250/2612093
dc.description.abstractA wave-energy converter has been studied through the combination of laboratory experiments and numerical simulations. The converter model is a semi-submerged axi-symmetric buoy with a circular cross section with a diameter of 26 cm at the water plane. The buoy is pitching about a fixed external axis oriented such that the buoy works primarily in heave. The laboratory model is equipped with a spring mechanism referred to as WaveSpring, which works to shift the resonance period and increase the response bandwidth of the system. A controlled electric actuator was connected and programmed to provide a velocity-proportional force for power extraction. The buoy mass was varied at two levels and the experimental setup was exposed to a selection of regular and irregular waves. The power take-off (PTO) damping was set as a function of sea state. A mathematical model for global motion response was developed based on linear hydrodynamic theory and rigid-body dynamics. Comparison of laboratory measurements and numerical simulation results shows that the dominant physical effects have been well captured by the mathematical model. Overall, the study gives an experimental verification that a negative spring mechanism mounted in parallel with the power take-off machinery of a wave energy converter may be used to increase the average converted power.nb_NO
dc.language.isoengnb_NO
dc.publisherMDPInb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titlePhysical and mathematical modeling of awave energy converter equipped with a negative spring mechanism for phase controlnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber1-23nb_NO
dc.source.volume11nb_NO
dc.source.journalEnergiesnb_NO
dc.source.issue9nb_NO
dc.identifier.doi10.3390/en11092362
dc.identifier.cristin1621916
dc.description.localcode© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).nb_NO
cristin.unitcode194,64,20,0
cristin.unitnameInstitutt for marin teknikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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