20~40kHz压电圆管换能器设计及测试

Design and Testing of the 20-40 kHz Broad-Band Piezoelectric Cylindrical Transducer

提出了一种水声测量领域常用的压电圆管换能器的设计,并应用有限元方法对压电圆管换能器进行研究。利用有限元分析软件ANSYS建立了圆管换能器的有限元模型,旨在优化换能器结构,分析换能器振动特性、电导特性和辐射特性。在此基础上,设计和制作了一个宽带无指向性圆管换能器.结果表明：换能器工作带宽为20-40 kHz,发射电压响应最大值为142 dB,发送电压响应起伏不超过±5 dB,具有良好的水平无指向性的发射性能。

This paper presents a design scheme of piezoelectric cylindrical transducers which are widely used in the field of underwater acoustics measuring, with the finite element method applied to research on piezoelectric cylindrical transducers. The finite element model of a transducer is set up using the ANSYS software, in order to optimize the transducer structure, as well as analyze the vibration, conductance and radiation characteristics. An underwater cylindrical transducer with broad-band directivity was designed and fabricated on the basis of the composite excitation, breathing mode and the dipole mode of vibration. The results show that the bandwidth of transducers is 20-40 kHz, in which the ripple of the transmitting voltage response does not exceed ±5 dB, and the maximum of the transmitting voltage response is 142 dB. The transducer has good horizontal direction independent beam pattern directivity.