Smart Structures and Systems

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The study on piezoelectric transducers: theoretical analysis and experimental verification

  • Sung, Chia-Chung (Department of Mechanical Engineering, National Cheng-Kung University) ;
  • Tien, Szu-Chi (Department of Mechanical Engineering, National Cheng-Kung University)
  • Received : 2013.04.03
  • Accepted : 2014.03.30
  • Published : 2015.04.25
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Abstract

The main purpose of this research is to utilize simple mathematical models to depict the vibration behavior and the resulted sound field of a piezoelectric disk for ultrasonic transducers. Instead of using 1-D vibration model, coupled effect between the thickness and the radial motions was considered to be close to the real vibration behavior. Moreover, Huygens-Fresnel principle was used in both incident and reflected waves to analyze the sound field under obstacles in finite distance. Results of the tested piezoelectric disk show that, discrepancies between the simulation and experiment are 2.5% for resonant frequency and 12% for resulted sound field. Therefore, the proposed method can be used to reduce the complexity in modeling vibration problems, and increase the reliability on analyzing piezoeletric transducers in the design stage.

Keywords

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