一类转子-轴承-密封系统在静态偏置下的动力学方程建模和仿真

A model and numerical simulation for a kind of rotor-bearing-seal system under the condition of static eccentricity

在Muszynska密封流体激振力模型中,考虑了密封腔中轴颈静态偏置的影响,建立了非线性转子-轴承-密封系统的动力学模型.其中,数值仿真了转速等因素对系统动态响应所造成的影响,给出了系统响应随转子偏心量、转速变化的分岔图、Poincare截面图、轴心轨迹图、时间响应图和最大Lyapunov指数图等.

In Muszynska sealing fluid exciting force model, this research focuses on the effects of static eccentrici- ty, and then establishes a nonlinear dynamic equation of rotor - bearing - seal system. By using the numerical sim- ulation method, the influences of a series of factors on the nonlinear dynamic behaviors such as the rotation speeds are analyzed. The bifurcation diagram, maximal Lyapunov exponent curves, Poincare maps and state trajectory as well as the three -dimensional bifurcation diagram are discussed.