Design, modeling and experiments of broadband tristable galloping piezoelectric energy harvester

Galloping based piezoelectric energy harvester is a kind of micro-environmental energy harvesting device based on flow-induced vibrations. A novel tristable galloping-based piezoelectric energy harvester is constructed by introducing a nonlinear magnetic force on the traditional galloping-based piez...

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Bibliographic Details
Published in:Acta mechanica Sinica 2020-06, Vol.36 (3), p.592-605
Main Authors: Wang, Junlei, Geng, Linfeng, Zhou, Shengxi, Zhang, Zhien, Lai, Zhihui, Yurchenko, Daniil
Format: Article
Language:English
Subjects:
Beam theory (structures)
Broadband
Classical and Continuum Physics
Computational Intelligence
Energy
Energy harvesting
Engineering
Engineering Fluid Dynamics
Euler-Bernoulli beams
Flow generated vibrations
Magnetic fields
Oscillations
Piezoelectricity
Research Paper
Theoretical and Applied Mechanics
Wind speed
Wind tunnel testing
Wind tunnels
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Summary:Galloping based piezoelectric energy harvester is a kind of micro-environmental energy harvesting device based on flow-induced vibrations. A novel tristable galloping-based piezoelectric energy harvester is constructed by introducing a nonlinear magnetic force on the traditional galloping-based piezoelectric energy harvester. Based on Euler–Bernoulli beam theory and Kirchhoff’s law, the corresponding aero-electromechanical model is proposed and validated by a series of wind tunnel experiments. The parametric study is performed to analyse the response of the tristable galloping-based piezoelectric energy harvester. Numerical results show that comparing with the galloping-based piezoelectric energy harvester, the mechanism of the tristable galloping-based piezoelectric energy harvester is more complex. With the increase of a wind speed, the vibration of the bluff body passes through three branches: intra-well oscillations, chaotic oscillations, and inter-well oscillations. The threshold wind speed of the presented harvester for efficiently harvesting energy is 1.0 m/s, which is decreased by 33% compared with the galloping-based piezoelectric energy harvester. The maximum output power of the presented harvester is 0.73 mW at 7.0 m/s wind speed, which is increased by 35.3%. Compared with the traditional galloping-based piezoelectric energy harvester, the presented tristable galloping-based piezoelectric energy harvester has a better energy harvesting performance from flow-induced vibrations.
ISSN:0567-7718
1614-3116
DOI:10.1007/s10409-020-00928-5