EFFECTS OF CENTERPLATE FRICTION ON TRUCK YAW HUNTING AND CARBODY LATERAL STABILITY
Observations of rail vehicle behavior indicate that metal-to-metal centerplate bearings are governed by Coulomb friction. A ten-degree-of-freedom, half-vehicle minicomputer model is used to investigate the behavior of a typical rail vehicle, with and without Coulomb centerplate friction. It is shown that Coulomb centerplate friction damps out small-amplitude yaw oscillations of a truck operating above its "critical speed," while larger-amplitude yaw oscillations can be self-sustaining or unstable. It is also shown that Coulomb centerplate friction can either improve or degrade carbody lateral stability, as compared to a vehicle with frictionless centerplates. Practical design alternatives are discussed.
- Contributed by the Rail Transportation Division of the American Society of Mechanical Engineers for presentation at the Joint ASME/IEEE Railroad Conference, April 28-30, 1981.
American Society of Mechanical EngineersTwo Park Avenue
New York, NY USA 10016-5990
- Woytowich, R T
- Publication Date: 1981-1
- Features: Figures; References; Tables;
- Pagination: 7 p.
- TRT Terms: Coefficient of friction; Critical velocity; Damping (Physics); Freight cars; Hunting (Dynamics); Mathematical models; Plates (Engineering); Ride quality; Trucks; Vehicle dynamics
- Uncontrolled Terms: Lateral stability
- Old TRIS Terms: Center plates; Critical speed; Freight car dynamics
- Subject Areas: Motor Carriers; Railroads; Vehicles and Equipment;
- Accession Number: 00334692
- Record Type: Publication
- Report/Paper Numbers: 81-RT-9 Conf Paper
- Files: TRIS
- Created Date: Jul 9 1981 12:00AM