Nonlinear vibration analysis of angular contact ball bearings supporting a rigid rotor is presented herein considering the frictional moments (load dependent and load independent components of frictional moments) in the bearings. Six degrees of freedom (DOF) of rigid rotor is considered in the dynamic modeling of the rotor-bearings system. Moreover, waviness on surfaces of inner race, outer race, and ball are considered in the model by representing it as sinusoidal functions with waviness orders of 6, 15, and 25. Two amplitudes of waviness, 0.05 and 0.2 μm, are considered in the investigation looking for the practical aspects. The proposed model is validated with the experimental results by performing the experiments. Moreover, the present model has also been validated with published results of researchers by incorporating needful changes in the DOF in the proposed model. Based on the computed results, it is observed that load dependent frictional moment (LDFM) significantly enhances the amplitudes of vibrations in comparison to load independent frictional moment (LIFM) irrespective to values of waviness amplitude and waviness order. The influence of inner race waviness is relatively more on the vibrations in comparison to waviness of outer race and ball. Moreover, vibrations of system enhance considerably at high amplitude of waviness, increase in the order of waviness, and at elevated operating parameters.
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February 2012
Research Papers
Vibration Modeling of a Rigid Rotor Supported on the Lubricated Angular Contact Ball Bearings Considering Six Degrees of Freedom and Waviness on Balls and Races
C. K. Babu,
C. K. Babu
Industrial Tribology, Machine Dynamics and Maintenance Engineering Centre (ITMMEC)
, IIT Delhi, New Delhi-110 016, India
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N. Tandon,
N. Tandon
Industrial Tribology, Machine Dynamics and Maintenance Engineering Centre (ITMMEC)
, IIT Delhi, New Delhi-110 016, India
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R. K. Pandey
e-mail: rajpandey@mech.iitd.ac.in
R. K. Pandey
Industrial Tribology, Machine Dynamics and Maintenance Engineering Centre (ITMMEC)
, IIT Delhi, New Delhi-110 016, India
Search for other works by this author on:
C. K. Babu
Industrial Tribology, Machine Dynamics and Maintenance Engineering Centre (ITMMEC)
, IIT Delhi, New Delhi-110 016, India
N. Tandon
Industrial Tribology, Machine Dynamics and Maintenance Engineering Centre (ITMMEC)
, IIT Delhi, New Delhi-110 016, India
R. K. Pandey
Industrial Tribology, Machine Dynamics and Maintenance Engineering Centre (ITMMEC)
, IIT Delhi, New Delhi-110 016, India
e-mail: rajpandey@mech.iitd.ac.in
J. Vib. Acoust. Feb 2012, 134(1): 011006 (12 pages)
Published Online: December 22, 2011
Article history
Received:
April 26, 2010
Revised:
September 7, 2011
Online:
December 22, 2011
Published:
December 22, 2011
Citation
Babu, C. K., Tandon, N., and Pandey, R. K. (December 22, 2011). "Vibration Modeling of a Rigid Rotor Supported on the Lubricated Angular Contact Ball Bearings Considering Six Degrees of Freedom and Waviness on Balls and Races." ASME. J. Vib. Acoust. February 2012; 134(1): 011006. https://doi.org/10.1115/1.4005140
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