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<p>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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<br>Subjects: Physics.; T-matrix; finite element model; MARTSAM; sonar array modeling</div>
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McLean, Kathleen Ann</div>
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