Stress Analysis and Structure Optimization for Piezoelectric Element End Faces of Langevin Transducers

doi:10.7652/xjtuxb201902008

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Stress Analysis and Structure Optimization for Piezoelectric Element End Faces of Langevin Transducers

更新时间：2025-07-09

- Stress Analysis and Structure Optimization for Piezoelectric Element End Faces of Langevin Transducers
- Vol. 53, Issue 2, Pages: 55-62(2019)
- 作者机构：
  
  四川大学制造科学与工程学院,成都,610065
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201902008
  CLC： TH113
- Online First：10 February 2019，
  
  Published：2019
- 稿件说明：
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Stress Analysis and Structure Optimization for Piezoelectric Element End Faces of Langevin Transducers[J]. 2019, 53(2): 55-62.
DOI：

Stress Analysis and Structure Optimization for Piezoelectric Element End Faces of Langevin Transducers[J]. 2019, 53(2): 55-62. DOI： 10.7652/xjtuxb201902008.

摘要

针对预紧力作用下传统的夹心式压电换能器会出现压电片受力不均匀的问题

提出了一种由环形垫块与短圆柱组成的新型换能器后盖板结构设计方案。基于半空间表面受垂直集中力作用的Boussinesq结果

求取换能器后盖板端面中心小区域受力时的应力解

结果显示压电片端面中心区域应力最大、靠近边缘处应力最小

并利用Ansys仿真软件和实验验证了理论分析的结果; 根据压电片的受力情况对后盖板的形状及尺寸进行优化

并修正了优化后模型的谐振频率; 加工、装配了优化前、后的换能器并测试其阻抗特性

结果表明:经优化后的夹心式压电换能器能够在保证阻抗性能参数基本不变的情况下

明显改善压电片端面处应力分布不均匀的现象。

Abstract

A new design for rear cover of transducer which consists of a ring pad and a short cylinder is proposed to solve the problem that the stress distribution on the piezoelectric element of the Langevin transducer is uneven under the action of preload. Firstly

the stress distribution on the central area of the rear cover end face is obtained based on the Boussinesq solution on the surface of a half-space subjected to vertical concentrated force. Results show that the stress at the center of the end face of the piezoelectric element is the largest while the stress near the edge is the smallest. The theoretical analysis results are verified by ANSYS simulation and experimental research. The stress distribution of the piezoelectric element is used to optimize the shape and size of the rear cover and the resonant frequency of the optimized model is corrected. Finally

a transducer is assembled and its impedance performance is tested. The experimental results show that the optimized structure significantly improves the stress distribution at the end of piezoelectric sheet while keeping good impedance performance.

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references

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