Accession Number:

ADA265432

Title:

Numerical Modeling of a Free-Flooded Piezoelectric Ring Sonar Transducer

Descriptive Note:

Masters thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1993-03-01

Pagination or Media Count:

114.0

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 materials 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 Hong-zhang Wang. A MATLAB 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 manufacturers 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

Subject Categories:

  • Electrical and Electronic Equipment
  • Computer Programming and Software
  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE