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- W3169285931 abstract "Analysis based on the Jeffcott model is presented to explain 1/2 speed and 1/3 speed whirling motion occurring in rotors which are subject to periodic normal-loose or normal-tight radial stiffness variations. The normal-loose stiffness variation results due to bearing-clearance effects, while normal-tight stiffness variations result from rubbing over a portion of a rotor's orbit. The results demonstrate that 1/2 speed subharmonic motion can be explained as either a linear parametric-excitation phenomenon or as a stable nonlinear subharmonic motion. The 1/3 speed motion is shown to be possible due to the radial stiffness nonlinearity. A linear parametric-excitation analysis demonstrates that during a normal-tight rubbing condition, Coulomb damping significantly widens the potential range of unstable speeds." @default.
- W3169285931 created "2021-06-22" @default.
- W3169285931 creator A5031998279 @default.
- W3169285931 date "1981-03-01" @default.
- W3169285931 modified "2023-09-26" @default.
- W3169285931 title "Fractional-frequency rotor motion due to nonsymmetric clearance effects" @default.
- W3169285931 hasPublicationYear "1981" @default.
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