Abstract：Considering factors, such as, base motion with low frequency and large swing and nonlinear oil film moments caused by tilting of rotor in bearings, the dynamic model of a sliding bearing-rotor system was established using Lagrange equation. Then, effects of base motion on nonlinear dynamic characteristics of the system were studied using the numerical method. The results showed that after the rotor system loses its stability for the first time, its dynamic bifurcation characteristics have two-branch of upper and lower complex quasi-periodic motions, and the rotating speed during the system losing its stability for the second time rises; when the rotor speed is higher, the rotor’s vibration amplitude increases sharply, and it reaches inner wall of bearing bush in quasi-periodic stage and can’t transit to chaotic state; effects of swing frequency and amplitude variation of base motion on dynamic characteristics of the system were discussed; the above conclusions are helpful to understand motion laws of sliding bearing-rotor systems with low frequency and large swing base motion.
张文卓，李明，韩永超. 低频大摆幅基础运动对滑动轴承-转子系统动力学特性的影响[J]. 振动与冲击, 2021, 40(7): 81-88.
ZHANG Wenzhuo, LI Ming, HAN Yongchao. Effects of low frequency and large swing base motion on dynamic characteristics of sliding bearing-rotor system. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(7): 81-88.
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