圆形复合压电振子弯曲振动的分析  

Bending vibration analysis of the circular composite piezoelectric vibrator

作　　者：丁少虎[1] 朱霆[2] 贺西平[1] 李军[1] 

机构地区：[1]陕西师范大学应用声学研究所,陕西西安710062 [2]第四军医大学西京医院,陕西西安710032

出　　处：《纺织高校基础科学学报》2007年第2期172-175,共4页Basic Sciences Journal of Textile Universities

基　　金：陕西省教育厅科研基金资助项目(07JK216)

摘　　要：为了寻求固定边界条件下最佳性能的双迭片压电振子的Unimorph弯振换能器,计算和分析了这种压电振子的共振频率、有效机电耦合系数与振子尺寸之间的关系,得出了设计弯曲换能器的最佳几何参数.结果表明,几何参数的变化对换能器的谐振频率和机电耦合系数影响很大,当参数α=0.49,β=0.71时有效机电耦合系数最高,可以达到0.31.In order to find the optimal performance of the fixed-edge double-layer piezoelectric Unimorph flexural transducer, the relationship between the resonance frequency, the effective electromechanical coupling coefficient and size of the piezoelectric actuator are calculated and analyzed, the optimum design of geometric parameters is obtained . The result shows that the geometric parameters change is very great influence to the transducer resonance frequency and the effective electromechanical coupling coefficient, when the thinckness ratio α and the radius ratio β are 0.49 and 0.71 respectively, the effective elec- tromechanical coupling coefficient reaches its maximum value 0.31.

关 键 词：双迭片 弯曲振动 共振频率 有效机电藕合系数 

分 类 号：O426.1[理学—声学]