带定心弹簧的挤压油膜阻尼器柔性转子系统主共振型双稳态特性

一、理论分析对于对称地支承在带定心弹簧的挤压油膜阻尼器上的 Jeffcott转子 ,在短轴承 π油膜及同心协调圆轨道的假设下 ,文献 1]已将系统的运动微分方程简化为如下形式的关于一个变量ε0 的非线性递推代数方程 :12 a1Ω2 + 1Ω22- 1- 1-Ω 22 aΩ2 (1-Ω 2 ) 2 + (2ζΩ) 2 ]+ 4BΩε0(1-ε20 ) 22 ε20+ 2ζΩ2 aΩ2 (1-Ω2 ) 2 + (2ζΩ) 2 ]+ BπΩ1(1-ε20 ) 3/ 22 ε20=U24a2 (1-Ω2 ) 2 + (2ζΩ) 2 ]tgψ1 =2ζΩ 12 a1Ω2 + 1Ω22 - 1+ 4BΩε0(1-ε20 ) 2 + BπΩ1-Ω2(1-ε20 ) 3/ 212 a1Ω 2 + 1Ω 22- 1+ 4BΩ . ε0(…

THE BEHAVIOR OF MAIN BISTABLE OPERATION IN FLEXIBLE ROTOR-SQUEEZE FILM DAMPER SYSTEM WITH CENTRALIZING SPRINGS

Based on theoretical analyses and experiments of flexible rotor squeeze film damper system with centralizing springs,this paper presents the investigation of the main resonant bistable operation occurred near the main resonant speed of the system,and deals with the regularity of occurence of the bistable operation and the influence of system parameters on the behaviors of the bistable operation.The calculated results and the experimental data are in a good agreement.It is found that the main resonant bistable operation is characterized by the sudden change of rotor vibration amplitude and by the transposition disc mass center.The reasons of the difference between theoretical analyses and experiments are discussed.