The ball and roller bearings were modeled in detail in whole aeroengine vibration model. The 5 DOF (degrees of freedom) model of ball bearing was established

and the bearing forces and moments were deduced under complex deformations of 5DOF. The cylindrical roller bearing was modeled by means of the “section method”

and the bearing force and moments were deduced considering the radial deformation

degree of convexity of cylindrical roller

bearing clearance

and angular deformation due to the bearing inclination. The complex bearing models were combined with the rotor and casing finite element beam model with 6 DOF

the whole aeroengine vibration model including modeling of complex ball and roller bearings was established

and the dynamic responses were solved by the numerical integral method. The aeroengine rig with casings was used to verify the correctness and effectiveness of the model. Compared with the experiment results and showed that

the errors of the first 3 orders natural frequencies were less than 5%

and the mode shapes were fully similar.