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- W2392968360 abstract "The rotors system of a turbofan engine that composes of three sub-rotor-systems is divided into three single-rotor systems at the coupling parts. The coupled forces are regarded as the external exciting forces for each single-rotor system. The vibration equations of the single-rotor system are derived from the lumped mass method and the vibration equations of each node. The global vibration equations of the entire multi-rotor system are established through the whole coupled matrixes of the coupling parts. To solve the global vibration equations, the logarithmic decrement of each mode of the whole rotors system is obtained, the minimum logarithmic decrement is regarded as the magnitude of stability margin of the whole multi-rotor system, and the sensitivity of the stability margin to the parameters of the rotors system is also calculated. The results show that to augment the damping of the bearings and the bending stiffness of the high pressure rotors system will improve the stability margin of the rotors system effectively. The existence of the elastic coupling and the increase in the rotational speed will reduced the stability margin of the whole rotor system." @default.
- W2392968360 created "2016-06-24" @default.
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- W2392968360 date "2010-01-01" @default.
- W2392968360 modified "2023-09-28" @default.
- W2392968360 title "Stability margin of rotors system of a turbofan engine and its sensitivity" @default.
- W2392968360 hasPublicationYear "2010" @default.
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