纵－扭复合振动夹心式压电超声换能器的研究  

The primary study of the pre-stressed piezoelectric longitudinal-torsional composite transducer

作　　者：阎向宏[1] 张福成[1] 

机构地区：[1]山东东营石油大学数理系,陕西师范大学声学所

出　　处：《声学技术》1995年第3期119-121,共3页Technical Acoustics

摘　　要：本文从纵振动和扭转振动的波动方程出发，结合复合振动换能器各组成部分在一维条件下，纵振动和扭转振动的等效网络，以一维声传输线理论为基础，推导出了复合振动换能器所满足的纵振动和扭转振动共振频率方程，通过合理地选择变截面杆的弯延指数β，从而设计出了同一长度下，纵振动的基波和扭转振动的二次谐波可以共振的纵－扭复合振动换能器，并对影响弯延指数β的因素进行了初步的探讨。实验结果表明，理论计算与实验结果基本符合。In this paper, according to the wave equation of the longitudinal and torsional vibration, on the base of the one￣dimentional transmission line theory,and through analysising the composite transducers every part's equivalent net, we gave out the longitudinal's and torsional's resonant frequency equation. If we choose the suitable parameter 5 of the exponnent bar, we can design a composite transducer that the longitudinal vibration fundamental frequency can coincide with the second harmonics of the torsional vibration in the same length o We also studied the parameter whch affecting parameter 5. The experiment results show that the theoretical computation is in agreement with the experimental results. Applied Acoustics Institute,Shanxi Teachers University,Xian.710062

关 键 词：纵振动 扭转振动 复合振动 换能器 超声换能器 

分 类 号：TB552[理学—物理]