Application of Probabilistic Sensitivities in Probabilistic Fatigue Analysis of Gas Turbine Engine Disks

Ronald Osborn, Harry Millwater
2005 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference   unpublished
A methodology is presented and applied that determines the sensitivities of the probability-offracture of a gas turbine disk fatigue analysis with respect to the parameters of the probability distribution of the random variables. This information is useful in determining the importance of the random variable parameters and the relative ranking of the variables. The methodology is demonstrated using a probabilistic fatigue analysis of a gas turbine compressor disk using the computer program
more » ... mputer program DARWIN ® . Although originally intended for use with titanium alloys, DARWIN has been extended to allow analyses to be conducted on other common materials used in the production of gas turbine disks that contain high-frequency anomalies. This paper takes into account this new capability and provides a systematic technique for computing sensitivities in a zone-based probabilistic framework.
doi:10.2514/6.2005-2147 fatcat:ldls7ilzxbeqlpiiuacb2lxgju