A new rotor-ball bearing-stator coupling dynamic model was established for the unbalance-rubbing coupling faults.In the model

the rotor mass unbalance and rubbing faults were fully considered.The nonlinear factors of ball bearing

such as the clearance of bearing

nonlinear Hertzian contract between balls and races

and the varying compliance(VC) of bearing support were modeled.Moreover

the numerical integral method was employed to obtain system' s responses

whereas the bifurcation and chaos motion were analyzed

followed by the effects of rotational speed

rubbing stiffness

rotor eccentricity

bearing house-stator stiffness

and stator-foundation stiffness on dynamic responses.Therefore

the non-linear dynamic response laws of rotor-ball bearing-stator system under unbalance and rubbing coupling faults were obtained.