COMPUTER SIMULATION OF STEADY-STATE AND TRANSIENT TIRE TRACTION PERFORMANCE. PROCEEDINGS ENTITLED "THE DYNAMICS OF VEHICLES ON ROADS AND ON RAILWAY TRACKS"
A computer simulation model is used to study transient tire behavior, e.g. wheel shimmy, at any mean slip angle with striction and/or sliding of tread elements as they move through the contact patch. The model also lends itself to the study of transient brake slip impact on braking force. The carcass is assumed to have the property of a belted tire. Tread-rubber elements are assumed infinitely thin in the circumferential directions. For each of the N-sections, mean values of lateral forces on base points are obtained by integration as elements simultaneously move from entry to exit of their respective sections. These N-values are point loads used to calculate new deflection and beam slope after each traverse of a new section for all elements. Friction forces generated between tread elements and the road surface are obtained as the product of vertical contact pressure and local friction coefficient. A beam damping scheme is employed to overcome problems associated with section midpoint lateral velocities; these velocities, calculated from successive deflections of the beam, cannot be used in computations since solution instabilities arise. The model is evaluated using experimental data for an FR70-14 tire. It is demonstrated that the model provides good insight into the distribution of element sliding speed and also the deflection pattern of tread and carcass. The model also gives information on the distribution of traction forces in the contact area. Suggestions for model refinement are offered.
- Also published in HS-026 982U, "The Dynamics of Vehicles on Roads and on Railway Tracks. Proceedings of International Union of Theoretical and Applied Mechanics Symposium, Delft, The Netherlands, 1975 August 18-22," Amsterdam, 1976 p 197-214.
International Union of Theoretical and Applied MechanicsChalmers University of Technology, Sweden
S-412 96 Gothenburg, Sweden
- Koch, JBC
- Publication Date: 1976
- Features: References;
- Pagination: 18 p.
- TRT Terms: Simulation; Slip surfaces; Tires; Traction; Vehicle dynamics
- Uncontrolled Terms: Lateral loads; Slip angle
- Subject Areas: Safety and Human Factors; Vehicles and Equipment;
- Accession Number: 00394103
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Report/Paper Numbers: HS-026 993U
- Files: HSL, USDOT
- Created Date: May 31 1985 12:00AM