FINITE ELEMENT TRACK STABILITY MODEL

The objective of this report is to simulate track stability so that the buckling load of the track can be predicted. Thus, the criteria for track design, maintenance and evaluation, as far as track stability is concerned, can be formulated. The simulation is achieved by a finite element model. Only the basic applications and potential of the model are illustrated. The model predictions are compared with experimental data and mathematical models in literature. A parameter investigation is presented. The model is in reasonably good agreement with test data in literature and, compared with other mathematical models, it shows much more versatility and same or better accuracy. The parameter investigation indicates that the lateral thermal buckling load of a 200' (61 m) tangent test track is not significantly affected by quadrupling the track length or by changes in longitudinal ballast resistance, but is greatly affected by changes in lateral ballast resistance, misalignments, and the presence of ineffective ties.

• Corporate Authors:

  Association of American Railroads Research Center

  3140 South Federal Street
  Chicago, IL  United States  60616
• Authors:
  • So, W
  • Martin, G C
• Publication Date: 1976-6

Media Info

• Features: Figures; References; Tables;
• Pagination: 103 p.

Subject/Index Terms

• TRT Terms: Alignment; Ballast (Railroads); Buckling; Computer programs; Finite element method; Maintenance of way; Mathematical models; Railroad rails; Railroad ties; Railroad tracks; Stability (Mechanics); Standards; Stiffness; Thermal stresses
• Uncontrolled Terms: Track stability
• Old TRIS Terms: Ballast stiffness; Rail thermal stresses; Track alignment; Track standards
• Subject Areas: Geotechnology; Maintenance and Preservation; Railroads;

Filing Info

• Accession Number: 00147597
• Record Type: Publication
• Source Agency: Association of American Railroads
• Report/Paper Numbers: R-236 Res. Rpt.7
• Files: TRIS
• Created Date: Feb 16 1977 12:00AM