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- W2783258848 abstract "The rotor system of aero engine will endure a severe bad working condition when aircrafts do flight maneuvers. This process can result in Multi-period or irregular transient vibration. In this paper a rotor/ball bearing system model is first established by using the finite element method. The dynamic characteristics of the system during maneuvers, with linear damping supports and squeeze film damper supports at the shaft ends respectively, are subsequently studied by adopting a corresponding hybrid numerical method. Time histories of velocity and displacement are employed to analyze the transient response during maneuvers. Frequency/waterfall spectra are used to reveal the sub- and super resonance in flight maneuvers. The results indicate that transient responses can be induced by both the commencement and the termination of the maneuvers. The squeeze film dampers (SFD) perform effectively on suppressing the amplitude of transient responses. Its damping effect is enhanced by flight maneuvers. The stiffness of central spring structure is found playing an important role on the damping behavior of SFD. Sub- and super-harmonic resonances can happen during flight maneuvers for linear damping supports but be suppressed significantly by the SFD." @default.
- W2783258848 created "2018-01-26" @default.
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- W2783258848 date "2018-04-01" @default.
- W2783258848 modified "2023-10-16" @default.
- W2783258848 title "Forced responses analysis of a rotor system with squeeze film damper during flight maneuvers using finite element method" @default.
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- W2783258848 doi "https://doi.org/10.1016/j.mechmachtheory.2018.01.004" @default.
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