Hydroelastic impact of piezoelectric structures

R. Panciroli, Maurizio Porfiri

Research output: Contribution to journalArticle

Abstract

In this paper, we experimentally study the hydroelastic impact of an active flexible wedge on an otherwise quiescent fluid. A piezoelectric transducer is incorporated in the wedge with the twofold intent of measuring structural deformations during the impact and assess the feasibility of piezoelectric energy harvesting in fluid entry problems. Experiments are conducted in a drop-tower, in which the drop height of the wedge from the water surface is parametrically varied to investigate the effect of the impact velocity on the piezohydroelastic response of the active structure. In these tests, the electrodes of the transducer are either open-circuited, to demonstrate piezoelectric sensing, or shunted with a resistor, to characterize piezoelectric energy harvesting. Our results demonstrate that the piezohydroelastic response of the structure is controlled by the impact velocity, which differentially regulates both the amplitude and frequency content of the electrical signals. Experimental results are interpreted through a distributed model based on linear plate theory and Wagner's approximate solution for the hydrodynamic load. Findings from this work are expected to find application in marine structures, where piezoelectrics can be used as sensors, to monitor the state of health of the structure, or as energy harvesters, to recover part of the energy that is otherwise lost in undesired vibrations.

Original languageEnglish (US)
Pages (from-to)18-27
Number of pages10
JournalInternational Journal of Impact Engineering
Volume66
DOIs
StatePublished - Apr 2014

Fingerprint

Energy harvesting
Ocean structures
Piezoelectric transducers
Harvesters
Fluids
Resistors
Towers
Transducers
Hydrodynamics
Health
Electrodes
Sensors
Water
Experiments

Keywords

  • Energy harvesting
  • Hydroelasticity
  • Piezoelectric
  • Sensing
  • Water slamming

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Ocean Engineering
  • Automotive Engineering
  • Aerospace Engineering
  • Civil and Structural Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Hydroelastic impact of piezoelectric structures. / Panciroli, R.; Porfiri, Maurizio.

In: International Journal of Impact Engineering, Vol. 66, 04.2014, p. 18-27.

Research output: Contribution to journalArticle

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