MODELING AND SIMULATING LONGITUDINAL TRAIN ACTION FORCES

This paper describes the program of the effort to model and simulate longitudinal train forces being developed in conjunction with the Track Train Dynamic Program Task Force #7. One objective of this portion of the task force's effort is to complete a computer model describing longitudinal train forces, but also verifying the model with actual train tests. Another stage of the project will be to establish a test or group of tests away from the train to study component response in order to derive input for the computer model. The subprograms written to compute longitudinal forces are discussed and the ability to input the response of various devices is shown. The basic models of the hydraulic end-of-car and sliding-sill devices are illustrated and described. Mathematical models of cushion unit behavior are shown and some of the problems using these models are reviewed. A test device called a "Train Action Simulator" is illustrated in schematic form and its operation is discussed. Typical data from the Train Action Simulator is given. This data has been verified by a series of low-velocity test track tests which are illustrated.

• Supplemental Notes:
  • Contributed by the Rail Transportation Division of The American Society of Mechanical Engineers for presentation at the ASME-IEEE Joint Railroad Conference, Pittsburgh, Pa., April 3-4, 1974
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Hawthorne, V T
• Publication Date: 1973-12

Media Info

• Features: Figures; References; Tables;
• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Cushioning materials; Gears; Train track dynamics
• Uncontrolled Terms: Draft gears
• Old TRIS Terms: Cushioning; Slack action
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00054012
• Record Type: Publication
• Source Agency: American Society of Mechanical Engineers
• Report/Paper Numbers: ASME #74-RT-1
• Files: TRIS
• Created Date: Jun 3 1974 12:00AM