DYNAMICS OF A MODEL VEHICLE RUNNING ON AN IMPERFECT ELASTIC TRACK

Theoretical analyses of both longitudinal and lateral dynamics of a scaled model subway vehicle were performed to identify design parameters and the relationships among different system components and conditions. The longitudinal analyses assumed both rigid and elastic trackage to estimate critical speeds. Effects such as the eccentricity of the wheel, track imperfections, curvature in the track plane, and the coupling between rotary and translation vibration due to asymmetry of the center of gravity were considered in the analysis. Lateral dynamics were also investigated, with particular attention focused upon both wheel shimmy, which involved solid and viscous friction, and the stability of the "snake" type motion of the vehicle on a rigid imperfect track. All critical speeds in the dynamic analysis exceeded the maximum required normal operations of subway vehicles (65 + miles per hour).

• Corporate Authors:

  Developmental Sciences, Incorporated

  Aerospace Technology Division
  City of Industry, CA  United States 
• Publication Date: 1971-2

Subject/Index Terms

• TRT Terms: Passenger cars; Railroad rails; Rolling contact; Subways; Train track dynamics; Vehicle dynamics; Wheels
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00044189
• Record Type: Publication
• Source Agency: Urban Mass Transportation Administration
• Report/Paper Numbers: Interm Rpt
• Files: TRIS, USDOT
• Created Date: Jun 15 1976 12:00AM