Interaction and multiscale mechanics

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Resonant vibration of piezoceramic plates in fluid

  • Lin, Yu-Chih (Department of Biomedical Engineering, Yuanpei University) ;
  • Ma, Chien-Ching (Department of Mechanical Engineering, National Taiwan University)
  • Received : 2007.12.03
  • Accepted : 2008.05.12
  • Published : 2008.06.25
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Abstract

In this paper, both experimental measurement and theoretical analysis are used to investigate the out-of-plane resonant characteristics of a cantilevered piezoceramic plate in air and three different kinds of fluid. The experimental method, amplitude-fluctuation electronic speckle pattern interferometry (AF-ESPI), is the major technique used in this study to measure the resonant characteristics of the cantilivered piezoceramic plate. Both resonant frequencies and full-field mode shapes are obtained from this experimental technique. Numerical computations based on the finite element analysis are presented for comparison with the experimental results. Good quality of mode shapes for the cantilevered piezoceramic plate in air is obtained from the AF-ESPI technique. However, the quality decreases as the viscosity of fluids increases. From the results provided from experimental measurements and numerical computations, it is indicated that the resonant frequencies of the cantilevered piezoceramic plate in fluid decrease with the increase of the viscosity of fluids. Good agreements between the experimental measured data and the numerical calculated results are found for both resonant frequencies and mode shapes of the cantilevered piezoceramic plate in fluid.

Keywords

Acknowledgement

Supported by : National Science Council

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