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Study of T53 engine vibrationVibration characteristics for overhauled T53 engines, including rejection rate, principal sources of vibration, and normal procedures taken by the overhaul center to reduce engine vibration are summarized. Analytical and experimental data were compared to determine the engine's dynamic response to unbalance forces with results showing that the engine operates through bending critical speeds. Present rigid rotor balancing techniques are incapable of compensating for the flexible rotor unbalance. A comparison of typical test cell and aircraft vibration levels disclosed significant differences in the engine's dynamic response. A probable spline shift phenomenon was uncovered and investigated. Action items to control costs and reduce vibration levels were identified from analytical and experimental studies.
Document ID
19790001890
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Walter, T. J.
(Mechanical Technology, Inc. Latham, NY, United States)
Date Acquired
September 3, 2013
Publication Date
November 1, 1978
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
MTI-78TR66
NASA-CR-135449
Accession Number
79N10061
Funding Number(s)
CONTRACT_GRANT: NAS3-20609
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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