Temperature dependence of piezoceramic disk resonant spectrum in radial vibration mode

M. Chure, Long Wu, King-kung Wu, B. Chen, Chia-Cheng Tung
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Abstract

In this paper, the resonant spectrum of piezoceramic disk in the frequency range from 1 kHz to 1 MHz is studied by the impedance analysis method. There are totally four vibration modes existed in the measured frequency range. The first one is fundamental radial vibration mode, and then the others are three radial overtone modes with inharmonic frequency separation. With the increasing of temperature, the whole resonant spectrum shift to the higher frequency. The variation of fundamental series resonant frequency fs with temperature is larger than that variation of fundamental parallel resonant frequency fp with temperature. The effective electromechanical coupling factor keff decreased with the increasing of temperature. The effect of temperature to the overtones mode is more obvious than that of fundamental mode.
径向振动模式下压电陶瓷盘谐振谱的温度依赖性
本文采用阻抗分析法研究了压电陶瓷圆盘在1 kHz ~ 1 MHz频率范围内的谐振谱。在测量的频率范围内,共存在四种振动模态。第一个是基本径向振动模态,然后是三个非谐波频率分离的径向泛音模态。随着温度的升高,整个谐振谱向高频偏移。基频串联谐振频率fs随温度的变化大于基频并联谐振频率fp随温度的变化。有效机电耦合系数keff随温度升高而减小。温度对泛音模态的影响比基频模态的影响更明显。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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