Chin. Phys. Lett.  2009, Vol. 26 Issue (8): 084301    DOI: 10.1088/0256-307X/26/8/084301
FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
Effects of Thickness Deviation of Elastic Plates in Multi-Layered Resonance Systems on Frequency Spectra
ZHANG Hui, ZHANG Shu-Yi, FAN Li
Lab of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093
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ZHANG Hui, ZHANG Shu-Yi, FAN Li 2009 Chin. Phys. Lett. 26 084301
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Abstract A model of high-overtone bulk acoustic resonators is used to study the effects of thickness deviation of elastic plates on resonance frequency spectra in planar multi-layered systems. The resonance frequency shifts induced by the thickness deviations of the elastic plates periodically vary with the resonance order, which depends on the acoustic impedance ratios of the elastic plates to piezoelectric patches. Additionally, the center lines of the frequency shift oscillations linearly change with the orders of the resonance modes, and their slopes are sensitive to the thickness deviations of the plates, which can be used to quantitatively evaluate the thickness deviations.
Keywords: 43.35.Zc      43.40.Le      43.58.Kr     
Received: 01 January 2009      Published: 30 July 2009
PACS:  43.35.Zc (Use of ultrasonics in nondestructive testing, industrial processes, and industrial products)  
  43.40.Le (Techniques for nondestructive evaluation and monitoring, acoustic emission)  
  43.58.Kr (Spectrum and frequency analyzers and filters; acoustical and electrical oscillographs; photoacoustic spectrometers; acoustical delay lines and resonators)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/8/084301       OR      https://cpl.iphy.ac.cn/Y2009/V26/I8/084301
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