【摘要】 倾斜摇摆工况下,不仅轴承承受载荷随时间变化,而且轴承动特性参数也发生变化,这必然会影响轴承支撑的转子系统的安全性与稳定性分析结果。仅通过稳态分析难以保证支撑轴承自身的安全性和可靠性以及转子轴承系统的稳定性。基于轴承刚度和阻尼的分段线性化假设,建立不同横摇角度的转子轴承模型,用某大学润滑理论与轴承研究所开发的转子轴承系统动力学分析软件DLAP(Dynamic Lubrication Analysis Program),耦合求解椭圆轴承转子系统动力学模型,采用特征值和特征向量,稳定性分析、不平衡响应分析以及瞬态动力学分析等手段,详细研究了转子轴承系统的稳定性和安全性,并与正常工况下轴系的动力学特性对比,最终得出摇摆工况下椭圆轴承支撑的转子系统的动力学特性。更多还原

【Abstract】 Under the condition of inclined swing, not only the bearing load, but also the dynamic characteristic parameter of the bearing is changed with time, which is bound to affect the safety and stability analysis results of the rotor-bearing system.Only through the steady state analysis is difficult to guarantee the safety and stability of the rotor-bearing system under swing condition. based on the assumption of piecewise linearization of bearing stiffness and damping, an elliptic rotor-bearing model with different rolling angles is established. Using a rotor-bearing system dynamic characteristics analysis software DLAP(Dynamic Lubrication Analysis Program)developed by the lubrication theory and Bearing Research Institute of Xi’an Jiaotong University, coupled solution of the elliptic rotor-bearing system dynamics model. By means of eigenvalue and eigenvector,stability analysis,unbalance response analysis and transient dynamic analysis, the stability and safety of the rotor-bearing system are studied in detail, and compared with that under normal operating conditions. Finally, obtain the dynamic characteristic of the rotor system supported by elliptic bearings under rolling condition.更多还原