円筒型送受波器の振動音響特性に関する研究

概要

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This paper presents the theoretical approach to predict the dynamic properties of a cylindrical shell transducer with finite length, Piezoelectric elements are embedded on the inner surface of the elastic shell at the constant pitch to generate the shell vibration in the specific circumferential eigen mode and to detect the incoming underwater sound through the shell vibration. Piezoelectrically excited vibration of cylindrical shell and its related sound radiation into water are discussed. Calculated frequency response function of the shell vibration, sound radiation efficiency and directivity pattern for the each eigen mode of the shell agreed well with the measured results. Shell vibration and associated electric output of the piezoelectric elements induced by the incident underwater sound wave are evaluated by the present method and these reisults are compared with the experimental data. Frequency response of the sum of the output voltage of the distributed piezoelectric elements induced by the incoming sound wave shows good agreement with measured results. Moreover, generated dynamic pressure distribution around the shell surface is measured and the comparison with the calculated results confirms the availability of the present theoretical method.
一般社団法人日本機械学会の論文
2000-07-25