Abstract:

Uncontained rotor failure is one of the typical risks that impose a particular threat on the safety of an aircraft. In this work, an uncontained rotor failure safety analysis system (URFSAS) is developed to facilitate its safety analysis. The relationship model of information required is provided by the relationship mapping between the catastrophic hazard of aircraft functional hazard analysis (FHA), the failure mode of the basic events of fault tree analysis (FTA) and the parts of aircraft digital mock-up. A simulation method based on Monte Carlo is proposed. All the parameters are set in the CATIA environment. Rotor fragment and its sweep path model are geometrically transformed. Space decomposition and hierarchical bounding are used to detect collision. Fault tree minimal cut sets generated are analyzed in comparison with simulation results. The hazard that is triggered by an uncontained fragment is recognized with the quantitative analysis of the uncontained rotor failure safety provided. Finally, an application instance is presented, which indicates that the URFSAS is valid and practical.

Key words: engine, uncontained rotor failure, fragment, safety analysis, aircraft digital mock-up