Open AccessFatigue Life Analysis of a Turboprop Reduction Gearbox
Author(s) -
David G. Lewicki,
J. D. Black,
M. Savage,
J. J. Coy
Publication year - 1986
Publication title -
journal of mechanisms transmissions and automation in design
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.911
H-Index - 120
eISSN - 2161-9573
pISSN - 0738-0666
DOI - 10.1115/1.3260811
Subject(s) - turboprop , bearing (navigation) , reliability (semiconductor) , engineering , lubrication , structural engineering , field (mathematics) , service life , power (physics) , reliability engineering , automotive engineering , computer science , mechanical engineering , mathematics , physics , artificial intelligence , quantum mechanics , pure mathematics
: A 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. Keywords: Turboprop engines, Fatigue life, and Life adjustment factors.
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