Internally coupled metamaterial beam for simultaneous vibration suppression and low frequency energy harvesting

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dc.contributor.author Hu, G en
dc.contributor.author Tang, Lihua en
dc.contributor.author Das, R en
dc.date.accessioned 2018-10-15T21:46:14Z en
dc.date.issued 2018 en
dc.identifier.issn 0021-8979 en
dc.identifier.uri http://hdl.handle.net/2292/41826 en
dc.description.abstract The paper proposes a modified metamaterial beam for simultaneous vibration suppression and energy harvesting. Local resonators in the modified metamaterial beam are alternately coupled, and each resonator is associated with a piezoelectric element for converting vibrations into electrical energy. First, the mathematical model of the modified metamaterial beam based piezoelectric energy harvester (PEH) is developed. The vibration suppression and energy harvesting performances of this system are analysed and compared with those of a conventional metamaterial beam PEH. The analytical results predict that not only the energy harvesting performance can be massively reinforced in the low frequency range, but also the vibration suppression performance can be slightly enhanced due to the appearance of an additional band gap. Subsequently, two finite element models, Models A and B, are developed. Model A is expected to be equivalent to the analytical model for validation and the local oscillators represented by lumped parameters in the analytical model are modelled by using cantilevers with tip masses. These tip masses are alternately coupled with ideal springs. The finite element analysis results in terms of both vibration suppression and energy harvesting show good agreement with the analytical results. Finally, to propose a more practical design of the internal coupling, Model B is established. Every two neighbouring tip masses are alternately coupled by using a beam connection. The finite element analysis results show that Model B is not completely equivalent to the proposed analytical model: no significant enhancement in terms of energy harvesting but a remarkably enhanced vibration suppression performance. en
dc.publisher American Institute of Physics en
dc.relation.ispartofseries Journal of Applied Physics en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0021-8979/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Internally coupled metamaterial beam for simultaneous vibration suppression and low frequency energy harvesting en
dc.type Journal Article en
dc.identifier.doi 10.1063/1.5011999 en
pubs.issue 5 en
pubs.begin-page 055107-1 en
pubs.volume 123 en
dc.rights.holder Copyright: AIP Publishing en
pubs.end-page 055107-17 en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Article en
pubs.elements-id 723552 en
pubs.org-id Engineering en
pubs.org-id Mechanical Engineering en
dc.identifier.eissn 1089-7550 en
pubs.record-created-at-source-date 2018-02-07 en
pubs.online-publication-date 2018-02-06 en


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