N-port analysis of a projector consisting of a coaxial array of ferroelectric shells

Author(s): H. Sabbagh ; T. Krile
Sponsor(s): IEEE Oceanic Engineering Society
Publisher: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 1 September 1976
Volume: 1
Page(s): 32 - 42
ISSN (Paper): 0364-9059
ISSN (Online): 1558-1691
DOI: 10.1109/JOE.1976.1145298



The coupling between a coaxial array of six ferroelectric shells and its fluid environment is computed by an application of N-port theory. Properties of the lowest ("breathing") mode of the shells are determined by using three-dimensional finite elements, and this knowledge is utilized in defining an N-port representation of the array. An N-port representation of the external fluid is obtained by solving the Helmholtz integral equation that relates fluid velocities and pressure on the exterior of the array. The two N-ports are coupled together in a standard circuit-theoretic manner to produce an equation for the electrical driving-point impedance of the loaded projector. Several frequency responses, which illustrate the effects of varying certain parameters are presented.