Energy harvesting from underwater base excitation of a piezoelectric composite beam

Youngsu Cha, Hubert Kim, Maurizio Porfiri

Research output: Contribution to journalArticle

Abstract

In this paper, we investigate energy harvesting from underwater base excitation of a piezoelectric composite beam. Four different geometric configurations are experimentally studied in which the beam is either fully submerged or is partially immersed, with an eighth, a quarter, or a half of its length vibrating underwater. The frequency and the amplitude of base excitation are systematically varied along with the shunting resistance to investigate the principles of piezoelectric energy harvesting from underwater vibrations. Results demonstrate that increasing the wet length produces a consistent reduction of the resonance frequency and the quality factor of underwater vibrations. On the other hand, the harvested power is found to generally decrease as the submersion length is increased. Experimental results are interpreted through a distributed piezohydroelastic model that accounts for added mass and nonlinear hydrodynamic damping effects. A reduced order modal model is further established to parametrically explore the system response across a variety of geometrical and physical parameters.

Original languageEnglish (US)
Article number115026
JournalSmart Materials and Structures
Volume22
Issue number11
DOIs
StatePublished - Nov 2013

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Energy harvesting
Vibrations (mechanical)
vibration
composite materials
Composite materials
excitation
Q factors
Hydrodynamics
Damping
damping
hydrodynamics
energy
configurations

ASJC Scopus subject areas

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

Cite this

Energy harvesting from underwater base excitation of a piezoelectric composite beam. / Cha, Youngsu; Kim, Hubert; Porfiri, Maurizio.

In: Smart Materials and Structures, Vol. 22, No. 11, 115026, 11.2013.

Research output: Contribution to journalArticle

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