Auxetic clamped-clamped resonators for high-efficiency vibration energy harvesting at low-frequency excitation
| Autor: | Fariba Ebrahimian, Zohre Kabirian, Davood Younesian, Pezhman Eghbali |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
020209 energy Mechanical Engineering Acoustics 02 engineering and technology Building and Construction Management Monitoring Policy and Law Piezoelectricity Finite element method Resonator General Energy 020401 chemical engineering Electrical resistance and conductance 0202 electrical engineering electronic engineering information engineering Shaker 0204 chemical engineering Proof mass Energy harvesting Energy (signal processing) |
| Zdroj: | Applied Energy. 295:117010 |
| ISSN: | 0306-2619 |
| DOI: | 10.1016/j.apenergy.2021.117010 |
| Popis: | Here, we utilize the auxetic concept to improve output electrical power and reduce resonance frequency for the piezoelectric vibration energy harvesting. An energy harvester consists of a proof mass and two supporter beams with piezoelectric patches, is proposed. Presented energy harvester prototype is appropriate for applications with limited allowable displacement. Three different auxetic structures are proposed and their performances are compared to the conventional plain system. Finite element (FE) modelling is provided to evaluate these structures and optimize their geometrical parameters and electrical resistance to achieve the best energy harvesting performance. The FE model is validated through experimental tests in which the energy harvesters with optimized parameters are excited by an electrodynamic shaker in different frequencies. It is shown that the proposed designs are able to remarkably enhance the harvested electrical power with respect to the plain structure. The experimental tests show that the Auxetic-I, II and III could enhance the output electrical power with a magnification factor of 10, 6.7 and 6.1 respectively, compared to the conventional structure. The resonant working frequency reduced up to 30.45%, 19.55% and 27.53% for different designs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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