带双挤压油膜阻尼器的转子系统动力响应研究

本文针对主轴承带无定心弹簧挤压油膜阻尼器将油膜力系数线性化处理,方便地用传递矩阵和线性迭代计算了非对称柔性转子系统稳态振幅响应。计算结果表明带两个阻尼器的减振效果比带一个阻尼器好。

INVESTIGATION ON STEADY-STATE RESPONSE OF A ROTOR-SUPPORT SYSTEM WITH TWO SQUEEZE-FILM DAMPERS

The rotor investigated is supported on two major ball bearings with squeeze-film dampers in the absence of the centralizing retaining springs. The coefficients of the film forces are linearized by using dynamical performances of the damper in the fixed coordinate system (four oil-film stiffness and four oil-film damping coefficients). The steady-state unbalance responses of an asymmtrical flexile rotor system has been easily determined by means of transfer matrix and linear iterative methods. Generally speaking, for the rotor system with nonlinear squeeze-film dampers, the optimum damper design with suitable unbalance level of the rotor, i.e. the mass eccentricity e = 0.01cm, will achieve the effect of vibration depression. The calculations show that the effect of vibration depression with two squeeze-film dampers is better than that with one. This conclusion has also been proved by the measured vibration data of a jet engine.