2011
DOI: 10.1139/tcsme-2011-0006
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Vibrations of a Rotor System With Multiple Coupler Offsets

Abstract: In this paper, a transfer matrix method (TMM) for rotors with multiple coupler offsets was derived. The studies showed the coupler's stiffness altered the rotor's critical speeds but offset caused additional external excitation. The cases of two offsets in-and anti-phase in a typical rotor were given as examples. In the in-phase case, significantly increased response amplitude occurred at lower rotational speed and the increase was linearly proportional to the offset value. As to the anti-phase case, the incre… Show more

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“…Namely, severe misalignment and rotating looseness (the gap between bearing nonrotating and rotating parts) have similar frequency spectrum characteristics [3][4][5]. Multiple theoretical [2,6,7] and experimental research have confirmed the main characteristics of the vibrations caused by the faults of shafts mis-alignment [8][9][10], and rotational looseness [11][12][13]. As main confirmation was that both faults have similar frequency spectrums with multiples of the rotational frequency.…”
Section: Introductionmentioning
confidence: 91%
“…Namely, severe misalignment and rotating looseness (the gap between bearing nonrotating and rotating parts) have similar frequency spectrum characteristics [3][4][5]. Multiple theoretical [2,6,7] and experimental research have confirmed the main characteristics of the vibrations caused by the faults of shafts mis-alignment [8][9][10], and rotational looseness [11][12][13]. As main confirmation was that both faults have similar frequency spectrums with multiples of the rotational frequency.…”
Section: Introductionmentioning
confidence: 91%