Numerical Modeling of a Free-Flooded Piezoelectric Ring Sonar Transducer
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 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
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1993
- Accession Number
- ADA265432
Entities
People
- Tiong B. Tay
Organizations
- Naval Postgraduate School