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Mode Saturation, Mode Coupling and Energy Harvesting From Ambient Vibration in a Portal Frame Structure

[+] Author Affiliations
J. M. Balthazar

UNESP – São Paulo State University, Rio Claro, SP, Brazil

R. T. Rocha, B. R. de Pontes, Jr., M. Silveira

UNESP – São Paulo State University, Bauru, SP, Brazil

R. M. F. L. Brasil

Universidade Federal do ABC, Santo André, SP, Brazil

A. M. Tusset

Parana Federal Technological University, Ponta Grossa, PR, Brazil

Paper No. DETC2014-34268, pp. V008T11A044; 10 pages
doi:10.1115/DETC2014-34268
From:
  • ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 26th Conference on Mechanical Vibration and Noise
  • Buffalo, New York, USA, August 17–20, 2014
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4641-4
  • Copyright © 2014 by ASME

abstract

There has been much recent interest in the concepts of electro-mechanical systems that are able to scavenge, or harvest energy from their operating environment. Here, we present the extraction of energy from a simple portal frame structure excited via its second (first symmetric) mode. As 2:1 internal resonance is present between that mode and the first (sway) mode, the phenomenon of mode saturation and energy exchange (modal coupling) occurs. Energy pumped into the system through the second (vertical) mode is partially transferred to the horizontal (sway) mode. This paper presents results of numerical simulations of these phenomena and energy harvesting using a nonlinear piezoelectric material as a means of energy transduction. An evaluation of the energy available for harvesting in each of the considered modes is computed.

Copyright © 2014 by ASME

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