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Research Papers

Structural-Acoustic Vibration Reduction Using Switched Shunt Piezoelectric Patches: A Finite Element Analysis

[+] Author and Article Information
Walid Larbi1

Chair of Mechanics, Structural Mechanics and Coupled Systems Laboratory, Conservatoire National des Arts et Métiers (Cnam), Case 353, 2 rue Conté 75003, Pariswalid.larbi@cnam.fr

Jean-François Deü

Chair of Mechanics, Structural Mechanics and Coupled Systems Laboratory, Conservatoire National des Arts et Métiers (Cnam), Case 353, 2 rue Conté 75003, Parisjean-francois.deu@cnam.fr

Monica Ciminello

 University of Naples Federico II, Aerospace Engineering Department, Via Claudio 23, 80125 Napoli, Italymonica.ciminello@gmail.com

Roger Ohayon

Chair of Mechanics, Structural Mechanics and Coupled Systems Laboratory, Conservatoire National des Arts et Métiers (Cnam), Case 353, 2 rue Conté 75003, Parisroger.ohayon@cnam.fr

1

Corresponding author

J. Vib. Acoust 132(5), 051006 (Aug 20, 2010) (9 pages) doi:10.1115/1.4001508 History: Received July 03, 2009; Revised February 17, 2010; Published August 20, 2010; Online August 20, 2010

In this paper, we present a finite element formulation for vibration reduction in structural-acoustic systems using passive or semipassive shunt techniques. The coupled system consists of an elastic structure (with surface-mounted piezoelectric patches) filled with an inviscid linear acoustic fluid. An appropriate finite element formulation is derived. Numerical results for an elastic plate coupled to a parallelipedic air-filled interior acoustic cavity are presented, showing the performances of both the inductive shunt and the synchronized switch shunt techniques.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 4

Typical voltage and displacement waveforms for SSDI technique

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Figure 5

Fluid/piezoelectric-structure coupled system: (a) geometrical data and (b) mesh (to scale)

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Figure 6

Fluid-structure coupled modes: fluid pressure level and plate total displacement

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Figure 7

Flowchart for the integration method used for the switch shunt system

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Figure 8

Mechanical transverse displacement at the center of the plate under the first mode excitation frequency

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Figure 9

Mechanical transverse displacement at the center of the plate under the fourth mode excitation frequency

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Figure 10

Pressure level in the middle of the acoustic cavity under the first mode excitation frequency

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Figure 11

Pressure level in the middle of the acoustic cavity under the fourth mode excitation frequency

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Figure 3

PZT equivalent electrical circuit scheme within a switched shunt architecture

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Figure 2

Vibrating plate coupled with an acoustic cavity and connected to a RL shunt circuit

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Figure 1

Fluid/piezoelectric-structure coupled system

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