偏心量影响下的松动故障转子非线性分析

Nonlinear analysis of loose fault rotor affected by eccentricity

利用拉格朗日方程建立了非稳态油膜力作用下的转子-定子-轴承系统松动故障的力学模型,应用数值分析方法研究该系统随偏心量变化时的分岔图,揭示系统分岔特性和进入混沌的途径。研究结果表明:当偏心量作为唯一控制参数时,系统呈现出复杂的非线性动力学行为,该结果为大型旋转机械的故障诊断提供理论依据。

Established the unsteady oil-film force with pedestal looseness fault of rotor-stator-bearing system mechanical models by using Lagrange equation.The numerical analysis is used to study the bifurcation diagram of the system with eccentricity,revealing the system into chaos and bifurcation characteristic ways.The results show that when the eccentricity as the only control parameters,system showing a complex nonlinear dynamics behavior,the results for the follow-up study of large rotating machinery fault diagnosis provides a theoretical basis.