TRUCK DESIGN OPTIMIZATION PROJECT (TDOP) PHASE II PERFORMANCE CHARACTERIZATION OF TYPE I FREIGHT CAR TRUCKS

TDOP/Phase II is part of a series of studies being conducted by the FRA to define the engineering options available to the railroad industry to improve the efficiency and productivity of rail freight operations. As part of this effort, experimental and analytic studies have been conducted to define the performance capabilities of the current freight car truck configurations. The results of these studies are used in arriving at quantitative characterization of performance of the standard, three-piece freight car truck under revenue service conditions. Field test data generated during TDOP/Phase I were supplemented with additional data gathered from field tests conducted during Phase II. These test data were reduced, analyzed, and interpreted in the light of physical reasoning as well as analytic simulations. Overall truck performance has been classified into four distinct and non-overlapping regimes, namely lateral stability, trackability, steady state curve negotiation, and ride quality. Performance indices, or measureable quantities typical of each performance regime, have been defined and quantified through the use of field test data and analytic simulations. Correlating the quantified performance indices within each regime with representative operating conditions such as speed, lading, and track quality, ranges of quantified performance levels have been arrived at as being characteristic of truck performance under the corresponding conditions of operation.

  • Corporate Authors:

    Wyle Laboratories

    Scientific Services and Systems Group
    Colorado Springs, CO  United States  80915

    Federal Railroad Administration

    Office of Research and Development, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • RamaChandran, P V
    • Elmadany, M M
  • Publication Date: 1981-1

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 74 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00341259
  • Record Type: Publication
  • Report/Paper Numbers: FRA/ORD-81/10 Tech Rpt., TDOP Rpt. TR-10
  • Contract Numbers: DOT-FR-742-4277
  • Files: TRIS, USDOT
  • Created Date: Aug 15 1981 12:00AM