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Aircraft Engine Bearing Reliability

Aircraft Engine Bearing Reliability. Statistical Methods for Reliability Engineering Dr. Ernesto Gutierrez-Miravete. Prepared by Orlando J. Rivera Anglero December 4, 2008. Rolling Element Bearing Fundamentals. Bearings: Provide relative location Support load

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Aircraft Engine Bearing Reliability

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  1. Aircraft Engine Bearing Reliability Statistical Methods for Reliability Engineering Dr. Ernesto Gutierrez-Miravete Prepared by Orlando J. Rivera Anglero December 4, 2008

  2. Rolling Element Bearing Fundamentals Bearings: • Provide relative location • Support load • Allow motion with acceptable friction • Provide support and positioning for the engine rotor shaft • Bearing Failure could cause in-flight shut down (IFSD)

  3. Probability Plots from Minitab DATA SET PROB PLOT FOR HOURS PROB PLOT FOR CYCLES

  4. Distribution Plots from Minitab Shape = 2.08174 = b Scale = 27482.1 = a F = 1-exp(-(t/27482)^2.08) Shape = 1.99466 = b Scale = 6175.32 = a F = 1-exp(-(t/6175)^1.99)

  5. Hours MTTF = 24342 MRL@MTTF = 10744 Cycles MTTF = 5473 MRL@MTTF = 2529 Maple vs. Monte Carlo

  6. F vs. R CYCLES HOURS

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