Article (Scientific journals)
Monolithic modeling and finite element analysis of piezoelectric energy harvesters
Ravi, Srivathsan; Zilian, Andreas
2017In Acta Mechanica, 228 (6), p. 2251-2267
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Abstract :
[en] This paper is devoted to monolithic modeling of piezoelectric energy harvesting devices. From a modeling perspective, piezoelectric energy harvesting is a strongly coupled phenomenon with two-way coupling between the electromechanical effect of the piezoelectric material and the harvesting circuit. Even in applications related to shunt damping, where the attached electrical circuit is passive, accurate modeling of the strong coupling is crucial for proper evaluation of the relevant parameters. The article proposes a monolithic mixed-hybrid finite element formulation for the predictive modeling and simulation of piezoelectric energy harvesting devices. The governing equations of the coupled electromechanical problem are converted into a single integral form with six independent unknown fields. Such a holistic approach provides consistent solution to the coupled field equations which involve structural dynamics, electromechanical effect of the piezoelectric patches and the dynamics of the attached harvesting circuit. This allows accurate computation of the eigenvalues and corresponding mode shapes of a harvester for any finite resistive load coupled to the harvester. The fully three-dimensional mixed-hybrid formulation is capable of analyzing structures with non-uniform geometry and varying material properties. The results of the finite element model are verified against the analytical results of a bimorph harvester with tip mass reported in the literature.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Author, co-author :
Ravi, Srivathsan ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Zilian, Andreas  ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
External co-authors :
no
Language :
English
Title :
Monolithic modeling and finite element analysis of piezoelectric energy harvesters
Publication date :
01 June 2017
Journal title :
Acta Mechanica
ISSN :
1619-6937
Publisher :
Springer Wien, Vienna, Austria
Volume :
228
Issue :
6
Pages :
2251-2267
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Computational Sciences
European Projects :
FP7 - 322151 - FSI-HARVEST - Numerical modelling of smart energy harvesting devices driven by flow-induced vibrations
FnR Project :
FNR3996097 - Numerical Modelling Of Smart Energy Harvesting Devices Driven By Flow-induced Vibrations, 2012 (01/02/2013-31/01/2017) - Srivathsan Ravi
Funders :
FNR - Fonds National de la Recherche [LU]
CE - Commission Européenne [BE]
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since 29 March 2017

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