A simulation model for risk assessment of turbine wheelsA simulation model has been successfully developed to evaluate the risk of the Space Shuttle auxiliary power unit (APU) turbine wheels for a specific inspection policy. Besides being an effective tool for risk/reliability evaluation, the simulation model also allows the analyst to study the trade-offs between wheel reliability, wheel life, inspection interval, and rejection crack size. For example, in the APU application, sensitivity analysis results showed that the wheel life limit has the least effect on wheel reliability when compared to the effect of the inspection interval and the rejection crack size. In summary, the simulation model developed represents a flexible tool to predict turbine wheel reliability and study the risk under different inspection policies.
Document ID
19920059432
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Safie, Fayssal M. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Hage, Richard T. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Quality Assurance And Reliability
Meeting Information
Meeting: Annual Reliability and Maintainability Symposium