VERTICAL MOTIONS DURING RAILCAR IMPACTS

In yard type impact situations, railcars strike other railcars producing car body pitching and vertical bounce. This vertical motion, if large enough, can cause vertical disengagement of couplers which could explain the penetration of tank car ends observed in accident situations. Preliminary investigation of vertical motions during impact, using a mathematical model, has successfully reproduced simulations of impacts in the elastic range. Examples confirm the possibility of coupler disengagement or center plate disengagement of railcars undergoing high speed impact. The computer program developed will solve for horizontal and vertical coupler force, vertical motion at the trucks and couplers, and slippage between adjacent car couplers. This work was sponsored by the RPI/AAR Tank Car Safety Research and Test Project Committee and represents one phase of the overall RPI/AAR study of means to improve tank car safety in accidents.

  • Supplemental Notes:
    • This paper was contributed the Rail Transportation Division of the ASME for presentation at the Winter Annual Meeting, Houston, Texas, November 30-December 4, 1975.
  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  United States  10016-5990
  • Authors:
    • Raidt, J B
    • MANOS, W P
    • Johnstone, B
  • Publication Date: 1975-7

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 7 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00128627
  • Record Type: Publication
  • Source Agency: American Society of Mechanical Engineers
  • Report/Paper Numbers: 75-WA/RT-10
  • Files: TRIS
  • Created Date: Jan 14 1976 12:00AM