Investigation of output voltage, vibrations and dynamic characteristic of 2DOF nonlinear functionally graded piezoelectric energy harvester

With the aim of providing the larger frequency band and progress the energy harvesting proficiency of the bistable piezoelectric energy harvester (BPEH), a 2-DOF nonlinear distributed parameter model of BPEH with an elastic magnifier is considered in this paper. This study deals with bimorph beam wi...

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Bibliographic Details
Published in:European physical journal plus 2020-03, Vol.135 (3), p.298, Article 298
Main Authors: Zamani, Mahdieh M., Abbasi, Mohammad, Forouhandeh, Fariborz
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Atomic
Bandwidths
Complex Systems
Condensed Matter Physics
Design parameters
Dynamic characteristics
Electric potential
Energy
Energy harvesting
Equations of motion
Flexibility
Frequencies
Frequency response
Hamilton's principle
Harmonic balance method
Investigations
Magnetic fields
Magnification
Mathematical and Computational Physics
Mathematical models
Methods
Molecular
Optical and Plasma Physics
Physics
Physics and Astronomy
Piezoelectricity
Polymers
Regular Article
Theoretical
Vibration
Voltage
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Summary:With the aim of providing the larger frequency band and progress the energy harvesting proficiency of the bistable piezoelectric energy harvester (BPEH), a 2-DOF nonlinear distributed parameter model of BPEH with an elastic magnifier is considered in this paper. This study deals with bimorph beam with functionally graded piezoelectric (FGP) layers carrying concentrated mass at tip while taking into account the geometrical nonlinear terms and the nonlinear magnetic force to enhance energy harvesting performance. By presenting the magnifier, oscillations of the tip are inspired into high-energy orbits. Mathematical model of BPEH with a dynamic magnifier has been developed, then the nonlinear coupled equation of motion derived using Hamilton principle. Initially, frequency response of harvester derived according to harmonic balance method and the adjusted model has been confirmed by parametric studies of earlier lumped parameter model. Analytical results show that the harvesting voltage can be improved with correct selection of design parameters of the magnifier. The proposed 2-DOF harvester system can provide higher output over a wider frequency band and may cause a considerable change in harvester performance. A parametric study is consummated to expose the effects of power law index of FGP on the output voltage and dynamic characteristic.
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/s13360-020-00276-0