关键词: 转子轴承系统；非线性特性；质点模型；有限元模型；分岔

Abstract:

The nonlinear dynamic behavior of a rotor-bearing system was analyzed with its finite element model based on the analysis of particle model,with considering some other important influence factors such as, material damping, gyroscopic
effect,inertia distribution, shear effect and so on,which made the description of the system more embodiment avoiding the casualness of selection with system parameters.With the comparison of the results on the bifurcation map and three-dimensional spectrum,significant difference is appeared with the addition of the considered factors.It is suggested that the substitution of continuum model for the discrete ones can get more accurate and abundant results.Furthermore,these results can provide more accurate verification and reference for the experiment and nonlinear dynamic design of the complex rotor system.

Key words: rotor-bearing system;nonlinear characteristics;practicle model;finite element model;bifurcation