Abstract
A bender disk transducer can generate low-frequency sound in a small size and light weight. But traditional bender disk transducer only works at single frequency by using first order bending mode and emits moderate levels of power. In this work, a double resonance bander disk low frequency transducer is investigated by using finite element model. The double resonance bender disk transducer consists of two segmented 3-3 mode piezoelectric ceramic disk on the both side of hollow metal disc, which could generate larger displacement in order to increase power radiation. A simple elastic mass system placed inside the hollow metal disc is introduced in the system to produce other lower resonance modes. Through the FEM calculations, it is found that the transmitting voltage response (TVR) of bender disk transducer could enhance 4dB in the first order bending mode resonance frequency, which is compared with traditional bender disk transducer with the same size. The TVR of lower resonance mode which is produced by additional central simple support elastic mass system in segmented bender disk transducer is more than 130dB. Through the optimization of finite element simulation, a double resonance bender disk transducer is designed, and its resonance frequency is 600Hz and 1kHz, respectively. The value of TVR is 130dB and 134dB corresponding to two resonance frequency. The double resonance bender disk transducer is compact dimension, low weight and it is a high performance low frequency transducer.
Highlights
The use of a bending vibration mode can allow an underwater acoustic transducer to achieve ideal low frequency radiation performance under a relatively small volume
The bender disk transducer that is structured based on the mosaic piezoelectric ring is designed and optimized by using the finite element software COMSOL, which aimed at improving the low frequency radiation power of the transducers
In the new bender disk transducer, the mosaic piezoelectric ceramic disk takes the place of the thickness-polarized piezoelectric ceramic disk that is used in traditional bender disk transducer; an elastic-mass vibration structure is added in the metal cavity
Summary
The use of a bending vibration mode can allow an underwater acoustic transducer to achieve ideal low frequency radiation performance under a relatively small volume. The bender disk transducer has been widely applied in underwater acoustic equipment that has certain requirements for the volume and weight of a transducer. The bender disk transducer usually works at a single frequency, for which the working bandwidth is narrow and the transmission power is low. The bender disk transducer that is structured based on the mosaic piezoelectric ring is designed and optimized by using the finite element software COMSOL, which aimed at improving the low frequency radiation power of the transducers. A second elastic mass vibration structure is introduced into the transducer to enable the bender disk transducer to achieve doublefrequency transmission and to expand the working bandwidth of the transducer
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
