Dual elliptical shells serially connected broadband flextensional transducer

作者：Li Zhiqiang; Mo Xiping; Zhang Yunqiang; Pan Yaozong

来源：Acta Acustica, 2016, 41(4): 494-498.

• Class IV flextensional transducer
• Finite element software
• Flextensional transducers
• Flexural modes
• High output power
• Longitudinal modes
• Membrane modes
• Transmitting voltage response

A new flextensional transducer with advantages of low frequency, broadband and high output power is provided. The transducer's shell is serially connected by two elliptical class IV flextensional shells along the major axis, and driven by two long piezoelectric ceramic stacks inside. With the help of finite element software, a sample whose bandwidth is broadened by coupling the first three flexural modes and the composite mode of driver's longitudinal mode and shell's membrane mode is designed. The sample's transmitting voltage response is more than 128.5 dB and the sound level is more than 190 dB from 1.4 kHz to 6.0 kHz. The tested results reveal that this new transducer not only has a broader bandwidth compared to the traditional class IV flextensional transducers which utilize the first flexural mode only, but also fulfills the requirements of low frequency and high power.

• 出版日期2016
• 单位中国科学院大学