水平盘旋转子参数对滚动轴承系统非线性振动影响

以双盘转子-滚动轴承系统为模型，利用有限元法建立了动力学方程，并以数值方法为手段得到转子系统振动响应，分析了机动载荷、偏心对转子系统非线性振动及分岔特性的影响，为研究更加符合实际的复杂工况耦合故障的转子动力学系统提供理论指导.研究结果表明:在水平盘旋机动飞行下，在二倍临界转速附近系统产生丰富的非线性动力学现象;随着机动载荷的增加，主共振转速提高，并且在转速区间内系统的振动形式更多趋于稳定的单周期运动.水平盘旋下，转子系统不仅能发生1/2亚谐共振，在某些参数下还产生了一些低频振动.

Effect of Hovering State Rotor Parameters on the Nonlinear Vibration of the Rolling Bearing System

Based on the model of the double disc rotor-rolling bearing system， a dynamic equation was established by using the finite element method， the vibration response of the rotor system was obtained by the numerical method， and the maneuver load was analyzed. The influence of eccentricity and maneuver load on the nonlinear vibration and bifurcation characteristics of the rotor system was analyzed， which provided theoretical guidance for researching the rotor dynamic system that is more in line with the actual coupling faults under complex working conditions. There are abundant nonlinear dynamic phenomena in the system near the double critical speed. With the increase of the maneuver load， the main resonance speed increases， and the vibration forms of the system tend to stabilize the single-period motion within the rotational speed range. The rotor system can not only produce 1/2 subharmonic resonance， but also produce some low frequency vibrations under some parameters.