Finite element analysis of flextensional electroacoustic transducers

Author

Chin, L.-C. ; Varadan, V.V. ; Varadan, V.K.

Author_Institution

Dept. of Eng. Sci., Pennsylvania State Univ., University Park, PA, USA

fYear

1991

fDate

8-11 Dec 1991

Firstpage

481

Abstract

Finite element analysis is used to investigate the actuator and sensor function of flextensional transducers, otherwise also called `moony´ transducers, which consist of a thin piezoceramic disk surrounded by a thin metal casing that encloses a crescent-shaped cavity on either side of the ceramic disk. This transducer is an effective actuator for large-displacement, high-sensitivity hydrophones and low-frequency underwater acoustic transmitters. A modal analysis of such a transducer is performed, and the admittance spectrum and the voltage sensitivity under hydrostatic pressure are studied as a function of frequency and cavity shape. The efficiency of such transducers for use as large displacement actuators is analyzed by plotting the surface displacement as a driving voltage is applied. The simulation is of use in the optimal design of flextensional transducers

Keywords

acoustoelectric transducers; finite element analysis; piezoelectric actuators; ultrasonic transducers; actuator; admittance spectrum; finite element analysis; flextensional electroacoustic transducers; high-sensitivity hydrophones; hydrostatic pressure; low-frequency underwater acoustic transmitters; modal analysis; moony transducer; optimal design; sensor function; simulation; surface displacement; voltage sensitivity; Acoustic sensors; Acoustic transducers; Actuators; Ceramics; Finite element methods; Piezoelectric materials; Sonar equipment; Transmitters; Underwater acoustics; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1991. Proceedings., IEEE 1991

Conference_Location

Orlando, FL

Type

conf

DOI

10.1109/ULTSYM.1991.234212

Filename

234212