Barrel-stave flextensional transducer design

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buir.advisorKöymen, Hayrettin
dc.contributor.authorŞahin, Aykut
dc.date.accessioned2016-01-08T18:10:03Z
dc.date.available2016-01-08T18:10:03Z
dc.date.issued2009
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and the Institute of Engineering and Sciences of Bilkent University, 2009.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2009.en_US
dc.descriptionIncludes bibliographical references leaves 104-105.en_US
dc.description.abstractThis thesis describes the design of low frequency, high power capability class-I flextensional, otherwise known as the barrel-stave, flextensional transducer. Piezoelectric ceramic rings are inserted inside the shell. Under an electric drive, ceramic rings vibrate in the thickness mode in the longitudinal axis. The longitudinal vibration of the rings is transmitted to the shell and converted into a flexural motion. Low amplitude displacements on its axis create high total displacement on the shell, acting as a mechanical transformer. Equivalent circuit analysis of transducer is performed in MATLAB and the effects of structural variables on the resonance frequency are investigated. Critical analysis of the transducer is performed using finite element modeling (FEM). Three dimensional transducer structure is modeled in ANSYS, and underwater acoustical performance is investigated. Acoustical analysis is performed by applying a voltage on piezoelectric material both in vacuum and in water for the convex shape barrel-stave transducer. Effects of transducer structural variables, such as transducer dimensions, shell thickness, shell curvature and shell material, on the electrical input impedance, electroacoustical transfer function, resonance frequency and quality factor are investigated. Thermal analysis of designed transducer is performed in finite element analysis. Measured results of the transducer are compared with the theoretical results.en_US
dc.description.provenanceMade available in DSpace on 2016-01-08T18:10:03Z (GMT). No. of bitstreams: 1 0003820.pdf: 2487818 bytes, checksum: e15051e36511219bfb38c417ab138235 (MD5)en
dc.description.statementofresponsibilityŞahin, Aykuten_US
dc.format.extentxiv, 105 leaves, illustrations, graphsen_US
dc.identifier.urihttp://hdl.handle.net/11693/14872
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectUnderwater Acoustic Transduceren_US
dc.subjectPiezoelectricen_US
dc.subjectHigh Poweren_US
dc.subjectLow Frequencyen_US
dc.subjectFlextensional Transduceren_US
dc.subjectBarrel-Staveen_US
dc.subject.lccQC242.2 .S35 2009en_US
dc.subject.lcshUnderwater acoustics.en_US
dc.subject.lcshTransducers.en_US
dc.subject.lcshElectroacoustic transducers.en_US
dc.subject.lcshANSYS (Computer system)en_US
dc.titleBarrel-stave flextensional transducer designen_US
dc.typeThesisen_US
thesis.degree.disciplineElectrical and Electronic Engineering
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

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