A MATHEMATICAL MODEL TO PREDICT THE DYNAMIC VERTICAL WHEEL/RAIL FORCES ASSOCIATED WITH LOW RAIL JOINTS

The magnitudes of transient vertical wheel/rail forces, known as the P sub 1 and P sub 2 forces, respectively, resulting from a vehicle's passage over isolated low rail joints are very large in comparison with static wheel/rail loads. In this study, a mathematical model was developed to predict the vertical wheel/rail forces and the forces between a locomotive's suspended traction motor and associated truck frame. A parametric study to investigate the influences of various input and system parameters on these forces was conducted using the model. It was also shown that a simplified first order model is sufficiently accurate to predict vertical wheel/rail forces.

• Corporate Authors:

  Association of American Railroads Research Center

  3140 South Federal Street
  Chicago, IL  United States  60616
• Authors:
  • ARSLAN, A V
  • Novoseletsky, L
• Publication Date: 1980-12

Media Info

• Features: Figures; References; Tables;
• Pagination: 78 p.

Subject/Index Terms

• TRT Terms: Car wheels (Railroads); Dynamics; Force; Joints; Mathematical models; Motors; Rail joints; Railroad cars; Railroad rails; Traction; Traction drives; Transients; Trucks; Wheels; Wheelsets (Railroads)
• Uncontrolled Terms: Vertical dynamics
• Old TRIS Terms: Low joints; Nose suspended; Truck dynamics
• Subject Areas: Motor Carriers; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00331131
• Record Type: Publication
• Report/Paper Numbers: AAR R-462
• Files: TRIS
• Created Date: Jul 9 1981 12:00AM