【摘要】 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-轴承系统裂纹故障的力学模型,应用数值分析方法提取了裂纹角变化时转子系统的动态响应,揭示了系统分岔特性和进入混沌的途径。研究结果表明:当裂纹角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了理论依据。更多还原

【Abstract】 Established the unsteady oil-film force with crack fault of rotor-stator-bearing system mechanical models by using Lagrange equation,and the dynamic response of rotor system when crack angle changes is extracted by using numerical analysis method. The results show that the system exhibits complex nonlinear dynamic behavior when the crack angle is the only control parameter. The results provide a theoretical basis for fault diagnosis of large rotating machinery.更多还原