Research on the displacement function and equivalent circuit of circular flexural vibration mode piezoelectric ceramic composite transducers
Research on the displacement function and equivalent circuit of circular flexural vibration mode piezoelectric ceramic composite transducers
复制标题
DOI：
10.1109/tuffc.2013.2553
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Huang Yihua;Wenjin Huang
中科院分区：
文献类型：
--
作者：
Huang Yihua;Wenjin Huang
弯曲振动模式压电陶瓷换能器可用于许多应用领域，因为它们能够在低水平的电激励下产生大位移，或者相反地，能够从低机械阻抗的源产生高输出。许多弯曲传感器非常薄，并且它们的行为可以通过基于薄板假设的当前理论来准确地分析和预测。然而，对于中等厚度的弯曲换能器，薄板假设不再有效。为了分析和预测中等厚度弯曲换能器的性能，必须建立一种新的理论。本文通过引入Mindlin的假设和理论，导出了中厚度圆形弯曲复合材料换能器的位移函数和等效电路。通过位移函数和等效电路，可以直接预测中厚圆形弯曲复合材料换能器的振动特性和电阻抗。
Flexural vibration mode piezoelectric ceramic transducers can be used in many application fields because of their ability to develop large displacement at low levels of electrical excitation, or conversely, to generate high output from sources of low mechanical impedance. Many flexural transducers are very thin, and their behavior can be analyzed and predicted accurately by the current theory based on thin-plate assumptions. However, for those flexural transducers with moderate thickness, the thin-plate assumptions are no longer valid. To analyze and predict the behaviors of the flexural transducers with moderate thickness, we must establish a new theory. In this paper, by introducing Mindlin's assumptions and theory, the displacement function and equivalent circuit for circular flexural composite transducers with moderate thickness are derived. Through the displacement function and the equivalent circuit, the vibration characteristics and the electrical impedance of circular flexural composite transducers with moderate thickness can be predicted directly.