An experimental study of vibration based energy harvesting in dynamically tailored structures with embedded acoustic black holes

Liuxian Zhao, Stephen Clarke Conlon, Fabio Semperlotti

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

In this paper, we present an experimental investigation on the energy harvesting performance of dynamically tailored structures based on the concept of embedded acoustic black holes (ABHs). Embedded ABHs allow tailoring the wave propagation characteristics of the host structure creating structural areas with extreme levels of energy density. Experiments are conducted on a tapered plate-like aluminum structure with multiple embedded ABH features. The dynamic response of the structure is tested via laser vibrometry in order to confirm the vibration localization and the passive wavelength sweep characteristic of ABH embedded tapers. Vibrational energy is extracted from the host structure and converted into electrical energy by using ceramic piezoelectric discs bonded on the ABHs and shunted on an external electric circuit. The energy harvesting performance is investigated both under steady state and transient excitation. The experimental results confirm that the dynamic tailoring produces a drastic increase in the harvested energy independently from the nature of the excitation input.

Original languageEnglish (US)
Article number065039
JournalSmart Materials and Structures
Volume24
Issue number6
DOIs
StatePublished - Jun 1 2015

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Condensed Matter Physics
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • Signal Processing

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