Phenomena and modeling of piezoelectric energy harvesting from freely oscillating cylinders

A. Abdelkefi, M. R. Hajj, A. H. Nayfeh

Research output: Contribution to journalArticlepeer-review

117 Scopus citations

Abstract

We investigate energy harvesting from vortex-induced vibrations of a freely moving rigid circular cylinder with a piezoelectric transducer attached to its transverse degree of freedom. The power levels that can be generated from these vibrations and variations of these levels with the freestream velocity are determined. A mathematical model that accounts for the coupled lift force, cylinder motion, and harvested voltage is presented. Linear analysis is performed to determine the effect of the electrical load resistance of the transducer on the natural frequency of the cylinder and the onset of synchronization (the shedding frequency is equal to the cylinder oscillating frequency) region. The impact of the nonlinearities on the cylinder response and harvested energy is investigated. The results show that the load resistance shifts the onset of synchronization to higher freestream velocities. For two different system parameters, the results show that the nonlinearities result in a hardening behavior for some values of the load resistance.

Original languageEnglish
Pages (from-to)1377-1388
Number of pages12
JournalNonlinear Dynamics
Volume70
Issue number2
DOIs
StatePublished - Oct 2012

Keywords

  • Circular cylinders
  • Energy harvesting
  • Piezoelectric material
  • Vortex-induced vibration

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