Show simple item record

dc.contributorMiddle Eastern Turbomachinery Symposium (3rd : 2015)
dc.creatorBachshmid, Nicolo
dc.creatorBistolfi, Simone
dc.creatorPesatori, Emanuel
dc.date.accessioned2018-10-12T19:56:06Z
dc.date.available2018-10-12T19:56:06Z
dc.date.issued2015
dc.identifier.urihttp://hdl.handle.net/1969.1/172679
dc.descriptionLectureen
dc.description.abstractTip timing blade vibration measuring systems have become nowadays common for monitoring blade vibrations, due to rather easy and non-intrusive installation of sensors. The data collected by the sensors must be heavily processed in order to get the vibration time histories of all blades at rated speed or during a run up or run down transient. In the paper a real case of tip timing measurement for a steam turbine is shown. Resonant/natural frequencies, amplitude and phase of each blade vibration with respect to the synchronous reference, are identified. The first measurement results shown are related to asynchronous vibrations of a steam turbine last stage blade row due to an instability. The second results are instead transient synchronous vibrations when passing a blade row resonance during a run up of the steam turbine. It is further shown how synchronous vibrations, although non stationary, allowed to identify damping and excitation amplitudes by means of an original approach based on modal analysis.en
dc.format.mediumElectronicen
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherTurbomachinery Laboratory, Texas A&M Engineering Experiment Station
dc.relation.ispartofMiddle East Turbomachinery Symposia. 2015 Proceedings.en
dc.subject.lcshTurbomachinesen
dc.titleBLADE VIBRATION MEASUREMENTS AND EXCITATION FORCE EVALUATIONen
dc.type.genreconference publicationen
dc.type.materialTexten
dc.format.digitalOriginborn digitalen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record