An innovative design of a 'Fish-mouth' flextensional transducer is proposed, it is utilized an elliptical shell with variable height. The special shell is provided with amplitude amplification and weighted he...An innovative design of a 'Fish-mouth' flextensional transducer is proposed, it is utilized an elliptical shell with variable height. The special shell is provided with amplitude amplification and weighted height amplification effect that is called 'double-amplification' effect. A prototype of the Terfenol-D 'Fish-mouth' flextensional transducer is developed. Theoretical analysis and experiments in lake are showed that the 'Fish-mouth' flextensional transducer has lower resonant frequency: about 1.1 kHz, wider frequency band: Q factor for - 3 dB bandwidth less than 3, transmitting current response level: 182 dB. A free-flooded cavity with compliant material is used to achieve depth capability.展开更多
文摘An innovative design of a 'Fish-mouth' flextensional transducer is proposed, it is utilized an elliptical shell with variable height. The special shell is provided with amplitude amplification and weighted height amplification effect that is called 'double-amplification' effect. A prototype of the Terfenol-D 'Fish-mouth' flextensional transducer is developed. Theoretical analysis and experiments in lake are showed that the 'Fish-mouth' flextensional transducer has lower resonant frequency: about 1.1 kHz, wider frequency band: Q factor for - 3 dB bandwidth less than 3, transmitting current response level: 182 dB. A free-flooded cavity with compliant material is used to achieve depth capability.