转子系统随机支撑刚度参数的识别

Identification of Random Supporting Stiffness of a Rotor System

基于Riccati摄动随机传递矩阵方法建立的转子系统特征值与随机参数变量间的函数关系,给出了转子系统随机参数的识别方法和详细步骤,可用于识别随机参数的均值和方差。以改装的Bently实验转子为研究对象,通过大量测试,识别出了转子系统的随机支撑刚度参数,建立了该转子系统的随机参数动力学模型。该模型可用于研究转子系统的随机参数动力学问题。

Functional relation between rotor system characteristic values and its random parameters based on Riccati perturbation random transfer matrix method provides an identification method and detailed steps for random parameters of rotor system, which can be used for identifying mean values and standard deviations of random parameters. Taking a modified Bently test rotor system as study object, more than 200 natural frequencies of the system were measured, and random supporting stiffness of the rotor system was identified, then a dynamic model describing random parameters of rotor system was built. This model can be used for studying the dynamic problem of rotor system random parameters.