横向穿孔对压电换能器振动特性的影响  

The vibration characteristics of the piezoelectric transducer with transverse perforation

作　　者：高晓蕾 刘世清[1] 樊叶萍 陈赵江[1] GAO Xiaolei;LIU Shiqing;FAN Yeping;CHEN Zhaojiang(College of Physics and Electronic Information Engineering,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]浙江师范大学物理与电子信息工程学院,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2022年第1期15-20,共6页Journal of Zhejiang Normal University:Natural Sciences

基　　金：国家自然科学基金资助项目(11874326;11874327)。

摘　　要：为了研究横向穿孔厚电极换能器的振动特性,利用有限元方法对穿孔位置、孔形、孔数和孔径等对换能器共振与反共振频率及其有效机电耦合系数的影响进行了研究,并对换能器穿孔前后轴向位移分布进行了对比分析.结果表明:换能器有效机电耦合系数随电极厚度的增加而减小;在换能器节面处、前盖板-压电陶瓷交界和前盖板中部不同位置穿孔,换能器共振频率及有效机电耦合系数皆随孔数、孔深和孔径的增加而降低;而节面处穿孔可使换能器获得较大的输出位移振幅;方孔对换能器共振频率的影响大于圆孔.该结果可为相关换能器的设计提供参考.The vibration characteristics of the transverse perforated thick electrode piezoelectric transducer was considered.The effects of the type,depth,diameter and number of the perforations on the resonance and anti-resonance frequency and the effective electromechanical coupling coefficient of the thick electrode transducer are studied by using finite element method,as well as the distribution of axial displacement amplitude before and after perforation.It was showed that the effective electromechanical coupling coefficient of the transducer decreased with the increase of electrode thickness.The resonant frequency and the effective electromechanical coupling coefficient was decreased with the increase of perforation parameters.The displacement amplitude of the transducer was promoted by the perforation at the nodal plane,and square perforation had a greater effect on the resonance frequency of the transducer than that of the circular perforations.These results provided the references for the design of related transducers.

关 键 词：压电换能器 横向穿孔 共振频率 反共振频率 位移 

分 类 号：O426.1[理学—声学]