Gas Turbine Casing Vibrations under Blade Pressure Excitation Forbes, Gareth Llewellyn en_US Randall, Robert Bond en_US 2021-11-25T13:33:56Z 2021-11-25T13:33:56Z 2009 en_US
dc.description.abstract The non-intrusive measurement of the condition of blades within a gas turbine would be a significant aid in the maintenance and continued operation of these engines. Online condition monitoring of the blade health by non-contact measurement methods is the ambition of most techniques. The current dominant method uses proximity probes to measure blade arrival time for subsequent monitoring. It has recently been proposed however, that measurement of the turbine casing vibration response could provide a means of blade condition monitoring, and even give the prospect of providing an estimation of the blade modal parameters. The casing vibration is believed to be excited pre-dominantly by (i) the moving pressure waveform around each blade throughout its motion and (ii) the moments applied by the stationary stator blades. Any changes to the pressure profile around the rotating blades, due to their vibration, will in turn affect these two dominant excitation forces, such that there will be some correlation between the casing response and blade vibrations. Previous work has introduced an analytical model of a gas turbine casing, and simulated pressure signal, associated with the rotating blades. The effect of individual rotor blade vibrations has been developed in order to understand the complex relationship between these excitation forces. A simplified turbine test rig has been constructed. Various aspects of the previous analytical modelling are presented, and then investigated and verified using results from the experimental program with this simplified test rig. en_US
dc.description.uri en_US
dc.language English
dc.language.iso EN en_US
dc.publisher Society for Machinery Failure Prevention Technology en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri en_US
dc.source Legacy MARC en_US
dc.subject.other casing vibrations en_US
dc.subject.other gas turbines en_US
dc.subject.other forced response en_US
dc.subject.other rotor blade vibrations en_US
dc.title Gas Turbine Casing Vibrations under Blade Pressure Excitation en_US
dc.type Conference Paper en
dcterms.accessRights open access
dspace.entity.type Publication en_US
unsw.description.publisherStatement Proceedings published by the British Institute of Non-destructive Testing: en_US
unsw.identifier.doi Dayton en_US
unsw.relation.faculty Engineering
unsw.relation.ispartofconferenceLocation Dayton, USA en_US
unsw.relation.ispartofconferenceName MFPT 2009 Failure Prevention: Implementation, Success Stories and Lessons Learned en_US
unsw.relation.ispartofconferenceProceedingsTitle Proceedings of The 2009 Conference of the Society for Machinery Failure Prevention Technology en_US
unsw.relation.ispartofconferenceYear 2009 en_US
unsw.relation.ispartofpagefrompageto 723-733 en_US
unsw.relation.originalPublicationAffiliation Forbes, Gareth Llewellyn, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW en_US
unsw.relation.originalPublicationAffiliation Randall, Robert Bond, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW en_US School of Mechanical and Manufacturing Engineering *
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