Resonant frequency of bimorph triangular V-shaped piezoelectric cantilever energy harvester

Hosseini, Rouhollah; Hamedi, Mohsen

doi:10.22061/jcarme.2016.521

Document Type : Research Paper

Authors

Rouhollah Hosseini ¹
Mohsen Hamedi ²

¹ Young Researchers and Elite Club, South Tehran Branch, Islamic Azad University, Tehran, Iran

² Professor, Faculty of Mechanical Engineering, University of Tehran, Tehran

https://doi.org/10.22061/jcarme.2016.521

Abstract

The concept of “energy harvesting” is to design smart systems to capture the ambient energy and to convert it to usable electrical power for supplying small electronics devices and sensors. The goal is to develop autonomous and self-powered devices that do not need any replacement of traditional electrochemical batteries. Now piezoelectric cantilever structures are being used to harvest vibration energy for self-powered devices. However, the geometry of a piezoelectric cantilever beam will greatly affect its vibration energy harvesting ability. This paper deduces a remarkably precise analytical formula for calculating the fundamental resonant frequency of bimorph V-shaped cantilevers using Rayleigh method. This analytical formula, which is convenient for mechanical energy harvester design based on Piezoelectric effect, is then validated by ABAQUS simulation. This formula raises a new perspective that, among all the bimorph V-shaped cantilevers and in comparison with rectangular one, the simplest tapered cantilever beam can lead to maximum resonant frequency and highest sensitivity. The derived formula can be commonly used as a relatively precise rule of thumb in such systems.

Graphical Abstract

Keywords

20.1001.1.22287922.2016.6.1.6.3

Main Subjects

Vibration

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Journal of Computational & Applied Research in Mechanical Engineering (JCARME)

Resonant frequency of bimorph triangular V-shaped piezoelectric cantilever energy harvester

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Volume 6, Issue 1 - Serial Number 11
December 2016
Pages 65-73

Resonant frequency of bimorph triangular V-shaped piezoelectric cantilever energy harvester

References

References

Send comment about this article

Volume 6, Issue 1 - Serial Number 11December 2016Pages 65-73

Volume 6, Issue 1 - Serial Number 11
December 2016
Pages 65-73