V.L.Karlash Once more on energy loss in piezoceramic resonators |
Acoustic bulletin, Vol. 17 ¹ 1, (2015) |
| The paper deals with analyzing of different approaches to the experimental determining of visco-elastic coefficients of piezoceramic resonators. The amplitude- and phase-frequency relations near the resonant and anti-resonant frequencies are investigated on an example of well-known problem of longitudinal vibrations of thin piezoceramic rod with the transverse polarization. The principles of refined computational-experimental method for determining the transverse electromechanic coupling coefficient as well, as elastic and piezoelectric losses tangent are described. The amplitudes and phases of full admittance components are calculated. The obtained results are in good agreement with the experimental data. |
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KEY WORDS: piezoceramic resonators, the electromechanic coupling coefficient, dielectric losses, elastic losses, piezoelectric losses, forced vibrations |
| TEXT LANGUAGE: Ukrainian Russian |