Prediction of the vibration response due to defects on rolling element bearings requires having an accurate representative vibration model. In this paper, a new model for vibration generation in the rolling element bearings has been introduced. The proposed model assumes a stochastic source of vibration excitation, which is produced as a result of metallic contact between bearing elements during rolling. This model explains high frequency vibration in the acceleration spectrum clearly. When a defect grows in the bearing, the roughness of the contacting surfaces increases locally and stochastic excitation becomes stronger in the defective area. The increased vibration level at the defective area is a good indicator of bearing faults. A numerical simulation of the proposed model was validated with experimental results.
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August 2011
Research Papers
A New Model for Estimating Vibrations Generated in the Defective Rolling Element Bearings
Mehdi Behzad,
Mehdi Behzad
Professor
Department of Mechanical Engineering,
e-mail: m_behzad@sharif.edu
Sharif University of Technology
, Tehran, Iran
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Abbas Rohani Bastami,
Abbas Rohani Bastami
Department of Mechanical Engineering,
Sharif University of Technology
, Tehran, Iran
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David Mba
David Mba
Professor
School of Engineering,
Cranfield University
, Cranfield, Bedfordshire MK43 0AL, UK
Search for other works by this author on:
Mehdi Behzad
Professor
Department of Mechanical Engineering,
Sharif University of Technology
, Tehran, Irane-mail: m_behzad@sharif.edu
Abbas Rohani Bastami
Department of Mechanical Engineering,
Sharif University of Technology
, Tehran, Iran
David Mba
Professor
School of Engineering,
Cranfield University
, Cranfield, Bedfordshire MK43 0AL, UKJ. Vib. Acoust. Aug 2011, 133(4): 041011 (8 pages)
Published Online: April 11, 2011
Article history
Received:
December 21, 2009
Revised:
November 22, 2010
Online:
April 11, 2011
Published:
April 11, 2011
Citation
Behzad, M., Bastami, A. R., and Mba, D. (April 11, 2011). "A New Model for Estimating Vibrations Generated in the Defective Rolling Element Bearings." ASME. J. Vib. Acoust. August 2011; 133(4): 041011. https://doi.org/10.1115/1.4003595
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