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为分析转子系统在压气机旋转失速故障作用下的横向振动,针对某型航空发动机转子系统,根据Mansoux模型推导了旋转失速下的压力、流量脉动响应及旋转失速横向激励力模型,并结合不平衡力、碰摩力模型,建立了航空发动机转子系统的动力学模型.仿真计算了不同工况下旋转失速激振力对转子系统振动响应,通过轴心轨迹图、频谱图、Poincare图、Bode图分析了旋转失速激振力对转子系统稳定性的影响.结果表明:旋转失速引起压气机转子强烈的非线性振动,并主要是低频振动.研究成果可为航空发动机设计和振动监测提供技术支持.
In order to analyze the lateral vibration of the rotor system under the failure of rotating compressor stall, a model of aeroengine rotor system is derived based on the Mansoux model. The pressure drop, the flow rate response and the lateral rotational force model of rotating stall are derived. The dynamic model of rotor system of aeroengine is established, and the vibrational response of rotor system to rotor system under different working conditions is simulated and calculated through the axial locus diagram, spectrogram, Poincare diagram, Bode plot The results show that the rotational stall causes strong non-linear vibration of the compressor rotor and mainly low-frequency vibration.The research results can provide technical support for the design of aero-engine and vibration monitoring.