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
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.