Rotor variable stiffness determining method and system based on arbitrary space oblique crack

The invention discloses a rotor variable stiffness determining method and system based on an arbitrary space oblique crack. The method includes the steps: determining a total strain energy model of anarbitrary space oblique crack rotor; determining a flexibility parameter of the arbitrary space oblique crack rotor according to the total strain energy model; determining a variable stiffness modelof the arbitrary space oblique crack rotor according to the flexibility parameter; inputting a parameter value of an arbitrary space oblique crack rotor to be detected into the variable stiffness model to determine the variable stiffness of the arbitrary space oblique crack rotor. According to the method, the variable stiffness of the arbitrary space oblique crack rotor is determined, so that rotor strength is designed, and rotor faults are diagnosed according to the variable stiffness at a later stage. 本发明公开种基于空间任意斜裂纹转子的变刚度确定方法及系统，所述方法包括：确定空间任意斜裂纹转子的总应变能模型；根据所述总应变能模型确定空间任意斜裂纹转子的柔度参数；根据所述柔度参数确定空间任意斜裂纹转子的变刚度模型；将待检测的空间任意