Analysis of Control and Energy Harvesting in a Viscoelastic-Piezoelectric Composite Plate
DOI:
https://doi.org/10.70567/mc.v42.ocsid8238Keywords:
Harvester-absorber, frequency, response, viscoelastic materialAbstract
A dynamic vibration absorber dissipates the mechanical energy of the system to which it is attached (primary system). An energy harvester converts the vibrations generated by this system into electrical energy. A device called a dynamic vibration absorber-harvester (DVAH) serves the dual purpose of reducing the vibratory response of the primary system and generating energy. This work presents a continuous model of a DVAH composed of a bimorph piezoelectric plate (model Q220-H4BR-2513YB), a viscoelastic sheet made of butyl rubber (model C1002-01PSA), and a stainless-steel layer that acts as a constraining layer. The composite model leads to the derivation of the DVAH’s equations of motion based on Hamilton’s principle, employing a fractional derivative model for the viscoelastic material. By applying modal decomposition and using Fourier analysis, it is possible to determine the system’s natural frequency, displacement, and generated voltage, both in the time and frequency domains. The validity of these results is compared with a previously developed lumped parameter model and a finite element simulation implemented in commercial software.
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