Title :
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
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;
Conference_Titel :
Ultrasonics Symposium, 1991. Proceedings., IEEE 1991
Conference_Location :
Orlando, FL
DOI :
10.1109/ULTSYM.1991.234212
