| ZHAO Xiang-wei, LUO Gui-huo, WANG Fei.Numerical Analysis of Effects of Static Eccentricity on VibrationCharacteristics of Squeeze Film Damper[J].航空发动机,2018,44(3):42-48 |
| Numerical Analysis of Effects of Static Eccentricity on VibrationCharacteristics of Squeeze Film Damper |
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| Key Words:vibration characteristics Squeeze Film Damper static eccentricity rotor shaft orbit |
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| Abstract:Due to the assembly error or the weight, the static eccentricity can't be avoided in use of SFD (Squeeze Film Damper). To
research the effects of static eccentricity on vibration characteristics of the SFD, the Reynolds equation of SFD under conditions of static
eccentricity was derived based on generalized Reynolds equation,, and a dynamic model of the SFD with static eccentricity- rotor system
was established. Then, the nonlinear response of the rotor system under conditions of static eccentricity was obtained by using numerical
integration. The results show that the rotor precession radius decreases with the static eccentricity; the static eccentricity has a marked
influence on the rotor shaft orbit, when there is static eccentricity, the rotor shaft orbit is close to ellipse instead of circle at most speeds, and
the instantaneous amplitude of sudden unbalance response is far above that without static eccentricity. |
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