Nonlinear dynamic analysis of coupled gear-rotor-bearing system with the effect of internal and external excitations

摘要: Extensive studies on nonlinear dynamics of gear systems with internal excitation or external respectively have been carried out. However, the characteristics under combined and excitations are scarcely investigated. An eight-degree-of-freedom(8-DOF) spur gear-rotor-bearing model, which contains backlash, transmission error, eccentricity, gravity input/output torque, is established, coupled lateral-torsional vibration studied. Based equations motion, system(SGRBS) investigated using Runge-Kutta numerical method, effects rotational speed, error fluctuation load dynamic responses explored. The results show that a diverse range such as periodic quasi-periodic chaotic behaviors impacts exhibited in system strongly attributed to interaction between excitations. Significantly, changing speed could effectively control system. Vibration level increases increasing fluctuation. Whereas has an influence force amplitude makes increase, motion may be restricted. proposed model can used for diagnosis faults practical SGRBS.