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Intermittent Chaotic Dynamics of Rail Axle Supported by Roller Bearings

[+] Author Affiliations
S. P. Harsha

Indian Institute of Technology Roorkee, Roorkee, UL, India

C. ‘Nat’ Nataraj

Villanova University, Villanova, PA

Paper No. DETC2009-87183, pp. 1187-1193; 7 pages
  • ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 1: 22nd Biennial Conference on Mechanical Vibration and Noise, Parts A and B
  • San Diego, California, USA, August 30–September 2, 2009
  • Conference Sponsors: Design Engineering Division and Computers in Engineering Division
  • ISBN: 978-0-7918-4898-2 | eISBN: 978-0-7918-3856-3
  • Copyright © 2009 by ASME


In this paper, intermittent chaotic analysis of high speed rail axle supported by roller bearings has been analyzed. In the analytical formulation, the contacts between rolling elements and races are considered as nonlinear springs, whose stiffness values are obtained by using Hertzian elastic contact deformation theory. The results show the appearance of instability and chaos in the dynamic response as the speed of the axle-bearing system is changed. Period doubling and mechanism of intermittency have been observed which lead to chaos. The appearance of regions of periodic, sub-harmonic and chaotic behavior is seen to be strongly dependent on the radial clearance. Poincaré maps, time response and frequency spectra are used to elucidate and to illustrate the diversity of the system behavior.

Copyright © 2009 by ASME



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