Influence from load-dependence and varying-compliance characteristics of rolling element bearing on nonlinear dynamic behaviors of gear transmission system

摘要

Due to the changing number of rolling elements in the load zone, rolling element bearings have the characteristics of load-dependence and varying-compliance with the cage rotation. The bearing enhanced excitation force model containing two kinds of bearing stiffnesses, which are mean stiffness for the load transfer capacity and alternating stiffness for the disturbance resisting ability, is developed for presenting the bearing nonlinear varying compliance excitation in the gear transmission system. Considering other dynamic excitations including mesh stiffness, contact pressure angle, center distance, unbalance force caused by static and dynamic eccentricity, an advanced iterative numerical method is introduced, which can timely and accurately update the excitations caused by load-dependent and timevarying nonlinearities inside of the system. The parametric resonant regions and system nonlinear periodic motion states are studied and compared with different bearing excitation models. The effects from bearing load-dependence and varying compliance on the system nonlinear vibration behaviours are investigated.

关键词