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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/18030
Title: Dynamic response of an unbalanced rotor supported on bearing with outer race waviness
Authors: Kankar P.K.
Sharma, Satish Chandra
Harsha, Suraj Prakash
Published in: Proceedings of ASME Design Engineering Technical Conference
Abstract: The paper investigates the non-linear dynamic response of an unbalanced rotor supported on ball bearings with outer race waviness. The excitation is due to unbalanced force and waviness on outer race. The sources of non-linearities are both the radial clearance as well as the Hertzian contact between races and rolling elements. The nonlinear responses due to unbalanced rotor supported on bearings are investigated. The combined effects like non-linear stiffness and non-linear damping for unbalanced rotor with bearing waviness have been considered and analyzed in detail for a rotor bearing system. In the mathematical formulation, the contacts between the rolling elements and the races are considered as an oscillating spring-mass-damper system. The appearance of regions of periodic, sub-harmonic and chaotic behavior is seen to be strongly dependent on the number of waves in the outer race. The results show the appearance of instability and chaos in the dynamic response as the number of waves in the outer race is changed. The study indicates that the interaction of ball passage frequency (ωbp) due to outer race waviness and rotational frequency (X) due to the unbalanced rotor force. Poincaré maps and frequency responses are used to elucidate and to illustrate the diversity of the system behavior. Copyright © 2013 by ASME.
Citation: Proceedings of ASME Design Engineering Technical Conference, (2013). Portland, OR
URI: https://doi.org/10.1115/DETC2013-13095
http://repository.iitr.ac.in/handle/123456789/18030
Issue Date: 2013
Publisher: American Society of Mechanical Engineers
Keywords: Design
Frequency response
Stress analysis
Ball passage frequency
Mathematical formulation
Non-linear dynamics
Non-linear response
Non-linear stiffness
Rotational frequency
Rotor-bearing system
Spring-mass-damper system
Dynamic response
ISBN: 9.78E+12
Author Scopus IDs: 8367238500
8142901100
6603548398
Author Affiliations: Kankar, P.K., Mechanical Engineering Discipline, PDPM-Indian Institute of Information Technology, Design and Manufacturing, Jabalpur, Madhya Pradesh, 482005, India
Sharma, S.C., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Harsha, S.P., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Corresponding Author: Kankar, P.K.; Mechanical Engineering Discipline, PDPM-Indian Institute of Information Technology, Design and Manufacturing, Jabalpur, Madhya Pradesh, 482005, India; email: pavankankar@gmail.com
Appears in Collections:Conference Publications [ME]

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