Broadband energy harvesting using acoustic black hole structural tailoring

Liuxian Zhao, Stephen Clarke Conlon, Fabio Semperlotti

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

This paper explores the concept of an acoustic black hole (ABH) as a main design framework for performing dynamic structural tailoring of mechanical systems for vibration energy harvesting applications. The ABH is an integral feature embedded in the host structure that allows for a smooth reduction of the phase velocity, theoretically approaching zero, while minimizing the reflected energy. This mechanism results in structural areas with high energy density that can be effectively exploited to develop enhanced vibration-based energy harvesting. Fully coupled electro-mechanical models of an ABH tapered structure with surface mounted piezo-transducers are developed to numerically simulate the response of the system to both steady state and transient excitations. The design performances are numerically evaluated using structural intensity data as well as the instantaneous voltage/power and energy output produced by the piezo-transducer network. Results show that the dynamically tailored structural design enables a drastic increase in the harvested energy as compared to traditional structures, both under steady state and transient excitation conditions.

Original languageEnglish (US)
Article number065021
JournalSmart Materials and Structures
Volume23
Issue number6
DOIs
StatePublished - Jan 1 2014

Fingerprint

Energy harvesting
Acoustics
broadband
Vibrations (mechanical)
acoustics
Transducers
Phase velocity
Structural dynamics
Structural design
transducers
energy
vibration
structural design
dynamic structural analysis
phase velocity
excitation
Electric potential
flux density
output
electric potential

All Science Journal Classification (ASJC) codes

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

Cite this

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Broadband energy harvesting using acoustic black hole structural tailoring. / Zhao, Liuxian; Conlon, Stephen Clarke; Semperlotti, Fabio.

In: Smart Materials and Structures, Vol. 23, No. 6, 065021, 01.01.2014.

Research output: Contribution to journalArticle

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