The disk-rod-fastening rotor dynamics model with squeeze film dumper(SFD) was built

and nonlinear differential equation method with multiple periodic solution was used to solve those equations with different combinations of system parameters;the influence law of bistable vibration characteristics of disk-rod-fastening rotor with SFD was studied

and the models' dynamic characteristics of stable system periodic solution with and without SFD were compared.The frequency spectrum analysis shows that the disk-rod-fastening rotor without SFD presents fundamental frequency vibration on bistable state

but that with SFD presents frequency multiplication besides fundamental frequency vibration.