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Title: Hydro-electromechanical modelling of a piezoelectric wave energy converter
Authors: Renzi, Emiliano
Keywords: Wave energy
Wave-structure interaction
Hydro-electromechanical resonance
Issue Date: 2016
Publisher: © The author. Published by the Royal Society
Citation: RENZI, E., 2016. Hydro-electromechanical modelling of a piezoelectric wave energy converter. Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences, 472(2195): 20160715.
Abstract: We investigate the hydro-electromechanical coupled dynamics of a piezoelectric wave energy converter. The converter is made of a flexible bimorph plate, clamped at its ends and forced to motion by incident ocean surface waves. The piezoceramic layers are connected in series and transform the elastic motion of the plate into useful electricity by means of the piezoelectric effect. By using a distributedparameter analytical approach, we couple the linear piezoelectric constitutive equations for the plate with the potential-flow equations for the surface water waves. The resulting system of governing partial differential equations yields a new hydroelectromechanical dispersion relation, whose complex roots are determined with a numerical approach. The effect of the piezoelectric coupling in the hydro-elastic domain generates a system of short- and long-crested weakly damped progressive waves travelling along the plate. We show that the short-crested flexural wave component gives a dominant contribution to the generated power. We determine the hydroelectromechanical resonant periods of the device, at which the power output is significant.
Description: This paper was accepted for publication in the journal Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences and the definitive published version is available at http://dx.doi.org/10.1098/rspa.2016.0715.
Version: Accepted for publication
DOI: 10.1098/rspa.2016.0715
URI: https://dspace.lboro.ac.uk/2134/23120
Publisher Link: http://dx.doi.org/10.1098/rspa.2016.0715
ISSN: 0080-4630
Appears in Collections:Published Articles (Maths)

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