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Fatigue life analysis of a turboprop reduction gearboxA fatigue life analysis of the Allison T56/501 turboprop reduction gearbox was developed. The life and reliability of the gearbox was based on the lives and reliabilities of the main power train bearings and gears. The bearing and gear lives were determined using the Lundberg-Palmgren theory and a mission profile. The five planet bearing set had the shortest calculated life among the various gearbox components, which agreed with field experience where the planet bearing had the greatest incidences of failure. The analytical predictions of relative lives among the various bearings were in reasonable agreement with field experience. The predicted gearbox life was in excellent agreement with field data when the material life adjustment factors alone were used. The gearbox had a lower predicted life in comparison with field data when no life adjustment factors were used or when lubrication life adjustment factors were used either alone or in combination with the material factors.
Document ID
19860060518
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lewicki, D. G.
(NASA Lewis Research Center Cleveland, OH, United States)
Coy, J. J.
(NASA Lewis Research Center; U.S Army, Propulsion Laboratory, Cleveland OH, United States)
Black, J. D.
(General Motors Corp. Allison Gas Turbine Div., Indianapolis, IN, United States)
Savage, M.
(Akron, University OH, United States)
Date Acquired
August 12, 2013
Publication Date
June 1, 1986
Publication Information
Publication: ASME
Subject Category
Mechanical Engineering
Report/Patent Number
ASME PAPER 85-DET-10
Accession Number
86A45256
Distribution Limits
Public
Copyright
Other

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