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Piezoelectric energy harvesting from concurrent vortex-induced vibrations and base excitations

Nonlinear dynamics, 2014-08, Vol.77 (3), p.967-981 [Peer Reviewed Journal]

Springer Science+Business Media Dordrecht 2014 ;Nonlinear Dynamics is a copyright of Springer, (2014). All Rights Reserved. ;ISSN: 0924-090X ;EISSN: 1573-269X ;DOI: 10.1007/s11071-014-1355-8

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Title:
Piezoelectric energy harvesting from concurrent vortex-induced vibrations and base excitations
Author: Dai, H. L. ; Abdelkefi, A. ; Wang, L.
Subjects: Acceleration ; Aerodynamic coefficients ; Aerodynamics ; Air flow ; Automotive Engineering ; Cantilever beams ; Circular cylinders ; Classical Mechanics ; Computational fluid dynamics ; Control ; Damping ; Dynamical Systems ; Electric power generation ; Electrical loads ; Energy harvesting ; Engineering ; Excitation ; Galerkin method ; Harvesters ; Load resistance ; Mechanical Engineering ; Nonlinear analysis ; Original Paper ; Piezoelectricity ; Reduction ; Synchronism ; Variation ; Vibration ; Vortex-induced vibrations ; Vortices ; Wind resistance ; Wind speed
Is Part Of: Nonlinear dynamics, 2014-08, Vol.77 (3), p.967-981
Description: We investigate the potential of using a piezoelectric energy harvester to concurrently harness energy from base excitations and vortex-induced vibrations. The harvester consists of a multilayered piezoelectric cantilever beam with a circular cylinder tip mass attached to its free end which is placed in a uniform air flow and subjected to direct harmonic excitations. We model the fluctuating lift coefficient by a van der Pol wake oscillator. The Euler–Lagrange principle and the Galerkin procedure are used to derive a nonlinear distributed-parameter model for a harvester under a combination of vibratory base excitations and vortex-induced vibrations. Linear and nonlinear analyses are performed to investigate the effects of the electrical load resistance, wind speed, and base acceleration on the coupled frequency, electromechanical damping, and performance of the harvester. It is demonstrated that, when the wind speed is in the pre- or post-synchronization regions, its associated electromechanical damping is increased and hence a reduction in the harvested power is obtained. When the wind speed is in the lock-in or synchronization region, the results show that there is a significant improvement in the level of the harvested power which can attain 150 % compared to using two separate harvesters. The results also show that an increase of the base acceleration results in a reduction in the vortex-induced vibrations effects, an increase of the difference between the resonant excitation frequency and the pull-out frequency, and a significant effects associated with the quenching phenomenon.
Publisher: Dordrecht: Springer Netherlands
Language: English
Identifier: ISSN: 0924-090X
EISSN: 1573-269X
DOI: 10.1007/s11071-014-1355-8
Source: AUTh Library subscriptions: ProQuest Central
Alma/SFX Local Collection

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Piezoelectric energy harvesting from concurrent vortex-induced vibrations and base excitations

Springer Science+Business Media Dordrecht 2014 ;Nonlinear Dynamics is a copyright of Springer, (2014). All Rights Reserved. ;ISSN: 0924-090X ;EISSN: 1573-269X ;DOI: 10.1007/s11071-014-1355-8

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