Abstract
The effect of partial rotor-to-stator rubbing is investigated both experimentally and analytically. It is found that due to rubbing the measured vibration signal is distorted showing a flattened portion in the waveform. Spectral analysis indicates that the synchronous component is generally attenuated as a result of rubbing-introduced-friction. It is also indicated that light rubbing induced vibrations are characterized by harmonics at frequencies equal to 1x rev., 2x rev., and 3x rev. Whereas, severe rubbing is identified experimentally by a spectrum containing subharmonics at 1/3 and 2/3 of the rotational frequency. Because of the stiffening effect of rubbing on the rotor, the resonance frequency increases. In general, the analytical results show good agreement with experimental data.
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This paper was recommended for publication in revised form by Associate Editor Eung-Soo Shin
Mohamed A. Abuzaid received his B.S. degree in Mechanical Engineering from Cairo University, Cairo, Egypt, in 1970. He then went on to receive his M. Eng. degree from Carleton University, Ottawa, Canada in 1979, and his Ph.D. degree from Cairo University, Egypt in 1987. Dr. Abuzaid is currently a lecturer at the Department of Mechanical Engineering Technology at the Public Authority for Applied Education & Training in Kuwait. His research interests are in the area of dynamics of rotating machines.
Mohamed E. Eleshaky received his B.Sc. and M.Sc. degrees in Mechanical Engineering from Alexandria University, Alexandria, Egypt, in 1982 and 1987, respectively. He then went on to receive a Ph.D. degree from Old Dominion University, Virginia, U.S.A in 1992. Dr. Eleshaky is currently an Assistant Professor at the Department of Mechanical Engineering Technology at the Public Authority for Applied Education & Training in Kuwait. He is also on leave from the Mechanical Engineering Department, Faculty of Engineering, Alexandria University, Egypt. His research interests are in the areas of aerodynamic design optimization and sensitivity analysis, computational fluid dynamics, jet flows, tribology, and vibrations.
Mohamed G. Zedan is an assistant professor in the Mechanical Engineering Dept., College of Technological Studies, Kuwait. He was a Staff Engineer in the gas turbine engine department, Textron Lycoming, Stratford, CT, U.S.A. He was a Sr. Research Engineer in the gas turbine engine department, Allison Gas Turbine GMC, IN, U.S.A. He has a B.Sc. degree in Mechanical Engineering from Cairo University, Egypt. He has a M.Sc. and Ph.D degrees in Mechanical Engineering from University of Waterloo, Canada.
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Abuzaid, M.A., Eleshaky, M.E. & Zedan, M.G. Effect of partial rotor-to-stator rub on shaft vibration. J Mech Sci Technol 23, 170–182 (2009). https://doi.org/10.1007/s12206-008-0717-x
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DOI: https://doi.org/10.1007/s12206-008-0717-x