Critical Speed and Limit Cycles in the Empty Y25-Freight Wagon

This article describes the modeling – via the use of non-linear equations of motions and kinematical constraints – of an empty freight wagon with Y25 bogies. The research uses non-linear creep forces with spin moment between wheel and rail. The authors have included modelling of all impacts and friction forces as part of the research. Along with solving non-linear equations in time domain, the research also shows solutions in limit cycles, saddle nodes, and critical speeds. The authors show both primary and secondary hunting in the responses of the wagons. Moreover, the relation between frequency of oscillations and speed is present, along with chaotic oscillations. Results note that stiffness in impacts affects calculation time and limit cycles.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09544097
• Authors:
  • Molatefi, H
  • Hecht, M
  • Kadivar, M H
• Publication Date: 2006-12

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Illustrations; Photos; References; Tables;
• Pagination: pp 347-359
• Serial:
  • Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
  • Volume: 220
  • Issue Number: F4
  • Publisher: Sage Publications Limited
  • ISSN: 0954-4097
  • EISSN: 2041-3017
  • Serial URL: http://pif.sagepub.com/content/current

Subject/Index Terms

• TRT Terms: Calculation; Car trucks (Railroads); Constraints; Creep; Engineering moments; Force; Freight cars; Friction; Hunting (Dynamics); Impact; Kinematics; Mathematical models; Mathematical oscillations; Nonlinear equations; Railroad rails; Railroad wheels; Stiffness
• Uncontrolled Terms: Critical speed analysis; Limit cycles; Train speed
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 01046495
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 25 2007 1:45PM