Comprehensive Analysis of Structural Safety and Durability for Aero-Engine

In order to meet the airworthiness requirements (FAR33.70) of large commercial aero-engines, a new approach of probabilistic risk assessment linked durability is presented, and aiming at the issue of low-failure probabilities of key aero-engine structures, probabilistic risk assessment based on the Monte Carlo Radius-Outside Sampling (MCROS) in combination with the Kriging is used, then random factors such as the material, loading and environment can be considered in the given method. Example of probabilistic risk assessment based on fatigue for lower pressure compressor disk of aero-engine demonstrates the applicability, versatility and accuracy of the approach.