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.
- 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.
American Society of Mechanical EngineersTwo Park Avenue
New York, NY USA 10016-5990
- Raidt, J B
- MANOS, W P
- Johnstone, B
- Publication Date: 1975-7
- Features: Figures; References; Tables;
- Pagination: 7 p.
- TRT Terms: Computer programs; Couplers; Crashes; Dynamic tests; Impacts; Mathematical models; Switching; Train track dynamics; Vehicle design
- Uncontrolled Terms: Dynamic analysis
- Old TRIS Terms: Car design; Tank car heads; Tank car safety research and test project
- Subject Areas: Design; Railroads; Safety and Human Factors;
- 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