Publication:
Numerical modeling of a free-flooded piezoelectric ring sonar transducer.

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Authors
Tay, Tiong Beng
Subjects
Numerical Modeling
Pizoelectric
Ring Transducer
Free-Flooded
Advisors
Baker, Steven R.
Wilson, Oscar B.
Pieper, Ron J.
Date of Issue
1993-03
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A two-dimensional finite element model of a low frequency, free- flooded piezoelectric thin ring sonar transducer was developed for use with the ATILA code. Effective material properties for the ring were determined from in-air modal analyses using ATILA. These were adjusted to obtain the closest agreement between the calculated ring resonance frequency and coupling coefficient and measured data supplied by the manufacturer. In addition, equations for the electrical admittance for this transducer in air were developed based on an analytical approach published by Hongzhang Wang (J. Acoust. Soc. Am. 79, 164-176 (1986)). A Mat lab program was written to implement these equations and to calculate various electromechanical network parameters. The calculated values agreed with measured values to within 5 percent . An in-water harmonic analysis, in which the transmitting voltage response and the directivity pattern are computed, was performed using the ATILA code. In general, results obtained using the finite element model and manufacturer's measured values agree within 10 percent. The effects of changes in material properties on acoustic performance of the transducer were investigated; the results are discussed.
Type
Thesis
Description
Series/Report No
Department
Engineering Acoustics
Electrical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
107 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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