Mission segment division of the whole aeroengine loading spectrum based on flight actions

This paper studies on a division method of the whole aeroengine loading spectrum flight mission segment and rotor speed mission segment, which is based on the actual flight actions and related to the flight operations of aeroengine and is suitable for the variable-speed aeroengines such as turbojet and turbofan. Through the research, the aeroengine loading spectrum operation-related mission segments can be divided, which can provide important data basis for the life research on the structures which are sensitive to flight maneuver (such as the main shaft, large gearbox and installation section), lay a foundation for the simulation, compilation and prediction of the whole aeroengine loading spectrum. Firstly, based on the summary of basic flight actions in actual flight, the division of flight mission segment was realized by programming. Moreover, the aeroengine rotor speed mission segments, associated with flight actions and missions, were divided based on the flight mission segment division results. Besides, the efficiency and accuracy of the mission segment division results were verified by adopting measured loading spectrum data. Finally, the characteristics of speed mission segment division results were compared and analyzed in tables and figures. The comparison results show that the characteristics of similar speed mission segments are similar, while the characteristics of different speed mission segments are different. And the shapes of similar mission segments vary to the change of flight actions and operations, which can reflect the operation-related feature of the segments.