Transformation of a Finite-Element Model of a Piezoelectric Spherical Shell Transducer from a Nodal to a Spherical Harmonic Function Representation

Abstract

A new method of array modeling which will be used to predict the performance of low frequency active sonar arrays is being investigated. In support of this effort, a network representation of a spherical shell piezoelectric transducer was developed. The transducer was modeled using the finite-element code MARTSAM, from which a nodal description of the transducer was obtained. A procedure was developed to reduce and transform the nodal description of the transducer into a spherical harmonic description. The spherical harmonic description of the transducer was computed at two frequencies, 112.5 Hz and 1125.3 Hz, corresponding to values of ka of 0.1 and 1. 0, respectively where a is the radius of the sphere.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1990
Accession Number
ADA236838

Entities

People

  • Kathleen A. Mclean

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Fields
  • Acoustic Waves
  • Acoustics
  • Capacitance
  • Cartesian Coordinates
  • Coordinate Systems
  • Equations
  • Geometry
  • Impedance
  • Piezoelectric Transducers
  • Radiation
  • Scattering
  • Sonar Arrays
  • Spherical Harmonics
  • Transducers
  • Wave Functions
  • Waves

Readers

  • Acoustical Oceanography.
  • Microwave Engineering.
  • Structural Dynamics.