Modeling of coupler and draft gear systems and their compressive behaviors for heavy-haul locomotives

作者：Xu Ziqiang^*; Wu Qing; Ma Weihua; Luo Shihui

来源：Journal of Southwest Jiaotong University, 2014, 49(1): 21-26.

DOI：10.3969/j.issn.0258-2724.2014.01.004

• Alignment control
• Compressive behavior
• Draft gears
• Friction surfaces
• Nonlinear hysteresis
• Operational behavior
• Rotation angles
• Wheel/rail wear

To study the compressive behavior of the coupler and draft gear system for heavy-haul locomotives, a typical cylindrical-pin coupler with coupler shoulder alignment control module and a long-flat pin coupler with tail friction surface were built, and a mathematical model for the coupler and draft gear system of heavy-haul locomotives were presented based on the resilient rubber draft gear model with nonlinear hysteresis characteristic. Using a train model composed of 4 locomotives and 1 simplified freight wagon, the compressive behaviors of the coupler and draft gear system and its effect on the wheelset lateral force and wheel/rail wear were investigated when the heavy-haul train was running on the straight track. The results show that, the compressive behaviors of the cylindrical-pin coupler and the long-flat pin coupler can be simulated accurately using the interactive coupler shoulder alignment control module and tail friction surface module. With the two stabilized functions, the coupler can constrain its rotation angle within 4.0°, thus decreasing the lateral component of coupler force and improving the running safety of the locomotive.

• 出版日期2014
• 单位西南交通大学