挤压油膜阻尼器同心度及碰摩对转子振动特性的影响

In order to investigate vibration characteristics of a rotor system during its squeeze film dampers (SFDs) having assembly non-concentricity and rubbing fault, the dynamic model of the rotor system with SFDs was established considering SFDs' assembly non-concentricity and rubbing fault. Its test model was built and used to conduct test verification. Theoretical analysis and test results showed that the lager the rotor whirl radius, the stronger the effects of SFD's assembly non-concentricity on rotor vibration; the larger the SFD's assembly non-concentricity, the smaller the rotor vibration amplitude, but the rotor system's non-linear vibration risk increases rapidly; when eccentric ratio of SFD is too big, inner and outer races of oil film may have rubbing to excite the rotor's reverse precession natural frequency, and the rotor's vibration amplitude fluctuates violently.