通过建立包含13A/QKX100型钩缓系统、两台八轴机车和一台模拟货车的列车动力学模型,计算制动工况下重载机车不同二系横向止挡参数匹配方案的车钩摆角和列车运行安全性指标,得出适当增大二系横向止挡刚度、减小二系横向止挡自由间隙,可以有效减小车钩摆角,有利于保持车钩的动态稳定并提高机车运行安全性.最终提出三种二系横向止挡参数匹配优化方案,即二系横向止挡自由间隙为10 mm,刚度为原刚度的2倍;二系横向止挡自由间隙为15 mm,刚度为原刚度的3倍;二系横向止挡自由间隙为20 mm,刚度为原刚度的5倍.%A dynamic train model including a 13A/QKX100 coupler and draft gear system, two eight-axle locomotives, and one dummy freight vehicle was established. The yaw angles of the coupler and safety index of the locomotives under different secondary lateral stopper parameter combination schemes were simulated for heavy haul locomotives under braking conditions. The results demonstrate that the yaw angles of the coupler can be effectively reduced by appropriately increasing the stiffness and reducing the free clearance of the secondary lateral stopper, which is conducive to maintaining the dynamic stability of the coupler and improving the safety of locomotive operation. Finally, three optimal schemes of the secondary lateral stopper parameters are proposed to match the calculation results. In these schemes, the free clearances of the secondary lateral stopper are 10, 15, and 10 mm with stiffnesses of 2, 3, and 5 times that of the original, respectively.
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