Design of 31-mode free-flooded ring transducers

Ankara : The Department of Electrical and electronics Engineering and the Institute of Engineering and Science of Bilkent University, 2008.Thesis (Master's) -- Bilkent University, 2008.Includes bibliographical references leaves 59-61.In this work, design and electromechanical analysis of radially polarized 31-Mode freeflooded ring transducers which have high power capability in deep submergence are explained. 31-Mode free-flooded ring transducers have Helmholtz resonance caused by the water inside, besides the radial resonance. By adjusting the dimensions of the ring, these resonance frequencies can be changed to the preferred values and desired band characteristics can be obtained. Transducer is designed using circuit theory techniques on the electrical equivalent circuit of free-flooded ring. The ring transducer is modeled in ANSYS, a Finite Element Modeling tool. The results obtained by analyzing the electrical equivalent circuit and the ANSYS outputs are compared. Electrical equivalent circuit parameters are updated considering the result obtained in finite element analysis. Effects of mounting end tubes are investigated by finite element analysis. New components related to the end tubes are inserted to the electrical equivalent circuit.Yılmaz, SacitM.S