Analysis on influence of traction force on locomotive wheel-rail adhesion performance

作者：Bi, Xin^*; Luo, Shi-Hui; Ma, Wei-Hua

来源：Journal of the China Railway Society, 2014, 36(2): 18-24.

DOI：10.3969/j.issn.1001-8360.2014.02.003

• Creep characteristics
• Nonlinear correction
• Running conditions
• Steering torque
• Three axle bogie
• Traction forces
• Wheel-rail adhesion
• Wheel-rail contacts

In order to understand wheel-rail creep characteristics of locomotive under the action of traction forces, using the linear creep theory and the nonlinear correction method, the wheel-rail contact creep forces formula was deduced. Combining with wheel-rail contact geometric features of the worn profile tread, the dynamic model of DF8B Locomotive with three-axle bogies was built by SIMPACK and dynamic simulation was made. The research results show as follows: When the locomotive with traditional bogies negotiate a curve under traction, the root segment of flange of the outside wheel of the guiding wheelset comes into contact with the rail and the total creep force becomes saturated;when the total wheel-rail contact creep force gets saturated, the traction force will cause redistribution of the longitudinal and lateral creep stresses on the wheel-rail contact interface, i. e., the larger the traction force, the larger the longitudinal creep force and the smaller the lateral creep force;the steering torque of guide wheelset reaches its maximum in the idle running condition and it decreases gradually along with increasing of traction force.

• 出版日期2014-2
• 单位牵引动力国家重点实验室; 西南交通大学