Author： Ramesh R. Vishnubhatla R.M.R.
Publisher： Academic Press
ISSN： 0022-460X
Source： Journal of Sound and Vibration, Vol.226, Iss.3, 1999-09, pp. : 573-584
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Abstract
A method to estimate the material parameters of 1–3 piezocomposites by non-linear regression analysis is presented. Experimentally measured electrical impedance data are least-squares fitted to a theoretical expression which accounts for the internal losses of a piezocomposite plate resonator vibrating in the thickness-mode. The process converges rapidly and the estimated values of the material parameters are comparable with that obtained from the constituent relations of 1–3 piezocomposites. The advantage of this method is that it can be used to estimate the material parameters of lossy resonators whose characteristic frequencies cannot be determined accurately.
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