STEADY-STATE VIBRATIONS OF RAIL ON AN ELASTIC DAMPED FOUNDATION SUBJECTED TO AN AXIAL FORCE AND A MOVING LOAD
The recent practice of continuously welded railroad rails suggests that considerable axial forces may be induced in the rails due to a change in temperature. This paper presents an analytical solution for the effect of an axial force on the steady-state vibrations of a rail continuously supported on an elastic damped (viscoelastic of the Kelvin type) foundation and subjected to a moving load. The presence of damping is shown to result in an unsymmetric dynamic deflection of the rail. Due to phase shift the largest deflection occurs slightly behind the point of application of the moving load, and the deflection ahead is always larger than the deflection behind the point of maximum deflection. The results are relevant to present studies of the temperature buckling of continuously welded railway rails. If the rail is near to the point of buckling due to thermal strains, additional longitudinal strain in the rail due to a moving load may result in buckling of the rail ahead of the moving load.
- Contributed by the Rail Transportation Division of The American Society of Mechanical Engineers for presentation at the IEEE-ASME Joint Railroad Conference, San Francisco, California, April 15-17, 1975.
American Society of Mechanical EngineersTwo Park Avenue
New York, NY USA 10016-5990
- Dokainish, M A
- Elmaraghy, W
- Publication Date: 1975-4
- Features: Figures; References;
- Pagination: 8 p.
- TRT Terms: Buckling; Deflection; Dynamics; Elasticity (Mechanics); Live loads; Rail (Railroads); Railroad tracks; Rolling contact; Stresses; Thermal stresses; Train track dynamics; Vibration; Welded rail; Wheel loads; Wheels
- Old TRIS Terms: Rail deflection; Rail stress; Rail thermal stresses
- Subject Areas: Railroads; Vehicles and Equipment;
- Accession Number: 00095225
- Record Type: Publication
- Source Agency: American Society of Mechanical Engineers
- Report/Paper Numbers: 75-RT-3
- Files: TRIS
- Created Date: Jul 2 1976 12:00AM