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dc.contributor.advisorShin, Young S.
dc.contributor.authorDurham, Richard W.
dc.dateMarch 1988
dc.date.accessioned2012-11-27T18:17:31Z
dc.date.available2012-11-27T18:17:31Z
dc.date.issued1988-03
dc.identifier.urihttp://hdl.handle.net/10945/23223
dc.description.abstractRecent studies have indicated that use of the bolted structural connection and the introduction of a viscoelastic material at the joint build-up can reduce the vibration response of a structure. Many potential applications utilizing this type of vibration reduction must operate in an underwater environment. A test structure consisting of two concentric circular shells connected by four vanes and assembled with bolts was tested to determine the effects of underwater exposure on the damping properties of a bolted structure. The effects of underwater exposure on system damping were examined for various structural bolt torques and for the application of a viscoelastic layer at the joint interfaces. With increasing underwater exposure time, the modal frequencies, damping and response amplitude remained constant. The changes in the frequency response of the structure with underwater exposure resulted from the effects of increased viscous fluid layer damping at the joint interfaces. As water replaced the air at the joint interfaces, with continued underwater exposure, the effects of viscous fluid layer damping increaseden_US
dc.description.urihttp://archive.org/details/experimentalinve00durh
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.subject.lcshMechanical engineeringen_US
dc.titleExperimental investigation of the effects of underwater exposure on the damping characteristics of bolted structural connections for plates and shellsen_US
dc.typeThesisen_US
dc.contributor.secondreaderKim, Kilsoo S.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentMechanical Engineering
dc.subject.authorViscous fluid dampingen_US
dc.subject.authorUnderwater excitationen_US
dc.subject.authorShells and platesen_US
dc.subject.authorStructural dampingen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Mechanical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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