A disc flextensional transducer

作者：Mo Xi Ping^*; Dai Yu Yu; Liu Yong Ping; Chai Yong; Liu Hui Sheng

来源：Journal of Harbin Engineering University, 2010, 31(7): 963-966.

DOI：10.3969/j.issn.1006-7043.2010.07.024

• ANSYS software
• Class V
• Disc
• Electro-acoustic
• Electroacoustic efficiency
• FEM
• Flextensional transducers
• Low frequency
• Metal structures
• Resonance frequencies
• Sonar transmissions
• Source level
• Transmitting voltage response
• Vaulted roof

Flextensional transducers and bender disc transducers are generally used as low frequency projectors radiating sound by the flexure of a metal structure. The authors developed a concept integrating both, and the resulting disc flextensional transducer was tested. In the design a radially polarized piezoelectric ceramic (PZT4) ring was used to drive a bending disc. The a vaulted roof in its center section was similar to the single-sided shell of a class V flextensional transducer. The outer circular section of the disc, with a thickness of 20 mm, was divided into 16 uniform fan-shaped pieces, each separated by gaps. The electro-acoustic performance of the prototype of the disc flextensional transducer was simulated by ANSYS software and also measured in a water tank. The maximum transmitting voltage response level was 110 dB and the maximum source level was 170 dB. At the resonance frequency of 1, 800 Hz, the electro-acoustic efficiency was 76%. The diameter of the transducer is 210 mm, the thickness is 46 mm, and the weight is 3.8 kg. The results showed that the transducer is capable of generating low frequencies, is small, and is highly efficient. It will be well suited for applications requiring miniature low-frequency sonar transmission systems and low-frequency active noise control systems.

• 出版日期2010