在滑动轴承转子系统中挤压油膜阻尼器的减振特性分析

研究了挤压油膜阻尼器在具有滑动轴承支承的非线性转子动力系统中的减振特性．首先分析了滑动轴承－转子非线性动力系统的稳定性及分岔行为．研究表明：在较大不平衡量作用下，系统易发生倍周期分岔、准周期分岔，失稳转速较低．然后分析了加入挤压油膜阻尼器后的滑动轴承－转子非线性动力系统的稳定性及分岔行为．分析表明：挤压油膜阻尼器的加入，有效地改变了系统的分岔行为，提高了失稳转速，特别是在较大不平衡量作用下，其效果更加明显

Theoretical Study on Dynamical Characteristics of the Rotor Fluid Bearing System with Squeeze Film Damper

The dynamical behavior of a rotor fluid bearing system with squeeze film damper is investigated. At first, the stability and bifurcation of the rotor fluid bearing systems are investigated. It turns out that under high unbalance, the period doubling bifurcation, and quasi periodic bifurcation will occur in the system with low threshold speeds. Analysis for the dynamical characteristics of the system with a squeeze film damper has been performed and it is found that the squeeze film damper can improve the stability of the system with high threshold speeds, and modify the behavior of the bifurcations especially under large unbalance.