The effect of tractive effort on a locomotive wheelset during curve negotiation is investigated. A detailed model of the forces which act at a wheel due to contact with the rail is developed taking account of the non-linearities due to geometry and creep force saturation. Steady state curving conditions are achieved when the wheelset satisfies force and moment static equilibrium. For the wheel/rail geometry used in this analysis, single point contact occurs for all lateral displacements. Kalker's DUVOROL is used to calculate the creep forces and an iterative technique is used to ensure that a torque balance exists on the wheel-set when an external traction torque is applied.
The mathematical model is used to investigate the effects of various parameters on a locomotive wheelset during steady state curving. Results show that softening the primary yaw suspension does not improve the curving behaviour of a locomotive as effectively as for non-powered vehicles. Further results show that the design of locomotive wheel profiles is very important for both flange wear and the limitation of tractive effort in adhesion.
LOCOMOTIVE BEHAVIOUR DURING CURVE NEGOTIATION
Vehicle System Dynamics ; 17 , sup1 ; 45-48
1988-01-01
4 pages
Article (Journal)
Electronic Resource
Unknown