SIX-POINT SUSPENSION SYSTEM FOR A RAILCAR BODY

A study of lateral and roll responses of a freight car, due to rail input when moving at the critical roll speed is undertaken using the IIT mathematical model. The objective is to generate design criteria for introducing additional spring/damper sets between the bolsters and car body in a typical freight car/truck system. In the cases studied, these additional sets are modeled to be located at the side-bearing points between bolsters and car body. This gives four additional support points for the car, resulting in a six-point suspension configuration. Various values of spring and viscous damper constants are simulated for the additional four suspension points at the side bearings, and the corresponding car body roll and lateral accelerations and displacement are obtained as a function of time.

• Supplemental Notes:
  • Presented at the 4th Annual Intersociety Conference on Transportation, Los Angeles, California, July 18-23, 1976, see also RRIS 26 148247.
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Willis, T
  • Shah, H B
• Publication Date: 1976

Media Info

• Features: References;
• Pagination: 5 p.

Subject/Index Terms

• TRT Terms: Damping (Physics); Dynamic tests; Freight cars; Mathematical models; Rocking; Rolling; Suspensions; Train track dynamics; Vehicle dynamics
• Uncontrolled Terms: Dynamic analysis
• Old TRIS Terms: Freight car dynamics; Resonant speed; Rock and roll
• Subject Areas: Railroads; Safety and Human Factors;

Filing Info

• Accession Number: 00148251
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: Paper D&O-33 Conf Paper
• Files: TRIS
• Created Date: Feb 16 1977 12:00AM