关键词: 航空发动机, 飞行载荷谱, 疲劳寿命

Abstract:

The design flight mission profiles and mission mixing of an aeroengine are obtained from its future usage, and then the rotation speed profiles are derived based on its altitude airspeed preformance.The compressor disc's stress and low cycle fatigue life are calculated under these rotation profiles.From the results, the choice ranges of the design duty cycles are given.Besides 0 maxiumm 0, idle maximum idle and cruise maximum cruise cycles, the load cycles which can create obvious fatigue damage to the engine components must be chosen into design duty cycles.

Key words: aeroengine, fligh t load spect rum, fat igue life