摘要
1-3型压电复合材料换能器具有重量轻、声阻抗率低等优点,复合材料换能器带宽的拓展一般采用匹配层的方法。采用厚度振动模态理论、横向模态理论和有限元方法对1-3型压电复合材料换能器进行研究,应用ANSYS软件建立换能器的有限元模型,然后进行结构优化,最终制作了一个利用厚度振动模态和一阶横向模态的13型压电复合材料宽带换能器,其工作带宽为190～390 kHz,发送电压响应起伏不超过±2dB。研究结果表明:利用厚度振动模态和一阶横向模态可以拓展1-3型压电复合材料换能器的带宽,同时也给出了一种高频换能器实现宽带发射的方法。
There are many advantages of 1-3 piezocomposite transducers, such as lighter weight, lower specific acoustic impedance. The matching layer is commonly used to expand the bandwidth of composite transducers. A 1-3 piezocomposite transducer is studied with thickness-mode oscillations model, lateral-mode model and finite element method. The finite element modal of transducer is set up with ANSYS software and the structure of the transducer is optimized. A fi- nal 1-3 piezocomposite transducer is designed, which used the thickness mode and the first lateral-mode. The bandwidth of the transducer is 190 ~ 390 kHz, in which the ripple of the transmitting voltage response does not exceed ±2 dB. There are several conclusions from the research： The bandwidth of 1-3 piezocomposite transducers can be expanded by the thickness mode and the first lateral-mode, and it gives a method to achieve the broad-band projecting performance of high-frequency transducer.
出处
《声学学报》
EI
CSCD
北大核心
2011年第6期631-637,共7页
Acta Acustica
