用于超声手术刀的夹心式换能器设计与有限元分析  

Design and finite element analysis of sandwich transducer for ultrasonic scalpel

作　　者：刘宇洋 刘平[1] 陈小红[1] 孙福佳[2] 周洪雷[1] LIU Yuyang;LIU Ping;CHEN Xiaohong;SUN Fujia;ZHOU Honglei(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学材料与化学学院,上海200093 [2]上海理工大学机械工程学院,上海200093

出　　处：《有色金属材料与工程》2022年第3期17-22,共6页Nonferrous Metal Materials and Engineering

基　　金：上海高性能医疗器械材料工程研究中心(No.20DZ2255500)。

摘　　要：传统的换能器设计方法成本高、效率低。利用理论计算并结合有限元方法设计了55 000 Hz的超声手术刀用压电换能器,以提高设计效率并验证方法的可行性。超声换能器设计为夹心式结构,使用PZT-8型压电陶瓷进行设计与仿真。首先理论设计出换能器各部件的初始尺寸并进行三维建模,将模型导入Workbench软件进行模态分析与谐响应分析,提取换能器工作时的谐振频率与输出振幅,并确定换能器最终尺寸。根据最终尺寸加工并装配得到实体换能器。最后利用阻抗分析仪对实体的谐振频率进行测量。结果表明,简化后的仿真模型谐振频率与实测值近似相等,为54 980 Hz。证明了设计思路的合理性与可行性,并对换能器的工作方式与优化设计提供了参考帮助。The traditional transducer design method has low efficiency and high cost. A piezoelectric transducer for ultrasonic scalpel with 55 000 Hz was designed by using theoretical calculation and finite element method to improve the design efficiency and verify the feasibility of the method. The ultrasonic transducer was designed as a sandwich structure, and PZT-8 piezoelectric ceramics were used for design and simulation. Firstly, the initial size of each component of the transducer was theoretically designed and three-dimensional modeling was carried out. The model was imported into workbench software for modal analysis and harmonic response analysis, the resonant frequency and output amplitude of the transducer were extracted, and the final size of the transducer was determined. The solid transducer was processed and assembled according to the final size. Finally, the resonant frequency of the entity was measured by impedance analyzer. The results show that the resonant frequency of the simplified simulation model is approximately equal to the measured value, which is 54 980 Hz. It proves the rationality and feasibility of the design idea, and provides reference help for the working mode and optimal design of the energy converter.

关 键 词：超声换能器 有限元 谐响应分析 阻抗 

分 类 号：TB552[理学—物理] TB559[理学—声学]