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dc.contributor.advisorVance, John M.
dc.creatorSrinivasan, Anand
dc.date.accessioned2004-09-30T01:48:47Z
dc.date.available2004-09-30T01:48:47Z
dc.date.created2006-05
dc.date.issued2004-09-30
dc.identifier.urihttp://hdl.handle.net/1969.1/263
dc.description.abstractInternal friction has been known to be a cause of whirl instability in built-up rotors since the early 1900's. This internal damping tends to make the rotor whirl at shaft speeds greater than a critical speed, the whirl speed usually being equal to the critical speed. Over the years of research, though models have been developed to explain instabilities due to internal friction, its complex and unpredictable nature has made it extremely difficult to come up with a set of equations or rules that can be used to predict instabilities accurate enough for design. This thesis deals with suggesting improved methods for predicting the effects of shrink fits on threshold speeds of instability. A supporting objective is to quantify the internal friction in the system by measurements. Experimental methods of determining the internal damping with non-rotating tests are investigated, and the results are correlated with appropriate mathematical models for the system. Rotating experiments were carried out and suggest that subsynchronous vibration in rotating machinery can have numerous sources or causes. Also, subsynchronous whirl due to internal friction is not a highly repeatable phenomenon.en
dc.format.extent2793887 bytesen
dc.format.extent157159 bytesen
dc.format.extent113108 bytesen
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/octet-stream
dc.format.mimetypetext/plain
dc.language.isoen_US
dc.publisherTexas A&M Universityen
dc.subjectInternal frictionen
dc.subjectinstabilityen
dc.subjectvibrationen
dc.subjectdampingen
dc.subjectrotordynamicsen
dc.titleThe influence of internal friction on rotordynamic instabilityen
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentMechanical Engineeringen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.nameMSen
thesis.degree.levelMastersen
dc.contributor.committeeMemberRahe, Maurice
dc.contributor.committeeMemberSan Andres, Luis
dc.type.genreElectronic Thesisen
dc.type.materialtexten
dc.format.digitalOriginborn digitalen


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