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  • 标题:Analysis of a micro piezoelectric vibration energy harvester by nonlocal elasticity theory
  • 本地全文:下载
  • 作者:Hao Chen ; Shan Jiang ; Longxiang Dai
  • 期刊名称:Advances in Mechanical Engineering
  • 印刷版ISSN:1687-8140
  • 电子版ISSN:1687-8140
  • 出版年度:2016
  • 卷号:8
  • 期号:4
  • DOI:10.1177/1687814016643453
  • 语种:English
  • 出版社:Sage Publications Ltd.
  • 摘要:A theoretical model of a micro piezoelectric energy harvester is proposed based on the nonlocal elasticity theory, which is operated in the flexural mode for scavenging ambient vibration energy. A nonlocal scale is defined as the product of internal characteristic length and a constant related to the material. The dependences of performance of the harvester upon the nonlocal scale and the scale ratio of the nonlocal scale to the external characteristic parameter are investigated in detail. Numerical results show that output power of the harvester decreases, and resonance frequency reduces gradually at first then increases rapidly when nonlocal scale increases. The results of nonlocal elasticity theory are compared with that of classic beam theory. All the results are helpful for material and structure design of the micro piezoelectric energy harvester.
  • 关键词:Energy harvesting; piezoelectricity; nanomechanics; microelectromechanical systems; elasticity theory
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