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- Title
Research on Dual-Functional Properties of an Asymmetric Piezoelectric Metamaterial Beam for Simultaneous Vibration Reduction and Power Generation.
- Authors
Wang, Xingguo; Wang, Lan; Shu, Haisheng
- Abstract
Purpose: In this paper, an asymmetric dual-functional piezoelectrical metamaterial beam is constructed to achieve vibration reduction and power generation simultaneously, and its dual-functional performances are investigated. Methods: A mathematical model of the vibration control and piezoelectric energy harvesting is developed for the asymmetric piezoelectric metamaterial beam, based on which the vibration reduction and energy harvesting performances of the system are evaluated, and the effect of the asymmetric distribution on the dual-function performance is discussed. The analytical results are then benchmarked with a finite element (FE) analysis. Results and conclusions: Compared with the conventional symmetric piezoelectric metamaterial beam, the asymmetric piezoelectric oscillator structure leads to a wave coupling phenomenon, which stimulates a new additional coupling bandgap and consequently improves the vibration suppression capability of the piezoelectric metamaterial beam. In addition, the asymmetric piezoelectric metamaterial beam can obtain better broadband power generation performance in the low-frequency band, mainly in the local resonance bandgap and band-edge. The center frequency of the power generation band of the asymmetric mode decreases monotonically and is obviously lower than that of the symmetric mode with the increase of the thickness difference, while the maximum output power in the bandgap presents an increasing trend first and decreases subsequently under the premise that the total thickness of the piezoelectric bimorph is constant. Therefore, the center frequency and maximum output power of the power generation band can be regulated by adjusting the thickness difference of the piezoelectric bimorph, thus obtaining a more excellent power generation performance and also expanding the scope of dual-functional applications of the piezoelectric metamaterial beam.
- Subjects
ENERGY harvesting; METAMATERIALS; DISTRIBUTION (Probability theory); COUPLINGS (Gearing)
- Publication
Journal of Vibration Engineering & Technologies, 2024, Vol 12, Issue 3, p3069
- ISSN
2523-3920
- Publication type
Article
- DOI
10.1007/s42417-023-01034-z