Simulation of longitudinal dynamics of long freight trains in positioning operations

Positioning operations are performed in a railway goods yard, in which the freight train is pulled precisely at a specific point by a positioner. The positioner moves strictly according to the predesigned speed and provides all the traction and braking forces which are highly dependent on the longitudinal dynamic response. In order to improve the efficiency and protect the wagons from damage during positioning operations, the design speed of the positioner has to be optimised based on the simulation of longitudinal train dynamics. However, traditional models of longitudinal train dynamics are not accurate enough in some aspects. In this study, the authors make some changes in the traditional theory to make it suitable for the study of long freight trains in positioning operations. In the proposed method, instead of the traction force on the train, the motion of the positioner is assumed to be known; more importantly, the traditional draft gear model with nonlinear spring and linear damping is replaced by a more detailed model based on the achievement of contact and impact mechanics; the switching effects of the resistance and the coupler slack are also taken into consideration. Numerical examples that deal with positioning operations on the straight lines, slope lines and curving lines are given.

• Record URL:
  https://doi.org/10.1080/00423114.2012.661063
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00423114
• Supplemental Notes:
  • Abstract reprinted with permission from Taylor & Francis.
• Authors:
  • Qi, Zhaohui
  • Huang, Zhihao
  • Kong, Xianchao
• Publication Date: 2012-9

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 1409-1433
• Serial:
  • Vehicle System Dynamics
  • Volume: 50
  • Issue Number: 9
  • Publisher: Taylor & Francis
  • ISSN: 0042-3114
  • EISSN: 1744-5159
  • Serial URL: https://www.tandfonline.com/toc/nvsd20/current

Subject/Index Terms

• TRT Terms: Freight trains; Longitudinal control; Simulation; Vehicle dynamics; Yard operations
• Subject Areas: Freight Transportation; Operations and Traffic Management; Railroads; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01453934
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 15 2012 12:33PM