平竖曲线重叠地段线形参数对米轨车辆动力特性的影响

为合理确定山区米轨铁路平竖曲线重叠地段线形参数,基于动力学理论建立米轨车辆—线路动力学模型,分析山区米轨铁路线路平竖曲线重叠地段的竖曲线形式、竖曲线半径、圆曲线半径等变化对车线系统动力特性的影响。结果表明:平竖曲线重叠地段采用凸形竖曲线形式相较于凹形竖曲线形式列车的动力通过性能更好;平竖曲线重叠设置对乘坐舒适性的影响最大,对行车安全性及轮轨作用力影响相对较小;竖曲线半径变化主要影响车体垂向加速度,当竖曲线半径增至10000 m后,对车体垂向加速度影响较小;平面圆曲线半径变化主要影响车体横向加速度,当平面圆曲线半径大于2000 m后,对车体横向加速度影响较小。

Influence of Parameter Setting at Overlapping Section of Horizontal and Vertical Curves on Dynamic Characteristics of Meter Gauge Railway

In order to reasonably determine the linear parameters in the overlapping sections of the horizontal and vertical curves of meter gauge railway in mountainous areas,the dynamic model of the meter gauge-track line should be established based on dynamics theory,and the influence of the radius of the circular curve on the dynamic characteristics of the vehicle line system is analyzed.The results show that the convex vertical curve form is better than the concave vertical curve form,and the power passing performance of the train is better;the overlap setting of the horizontal and vertical curve has the greatest impact on the riding comfort,but has relatively little impact on the driving safety and the effect of the wheel and rail;the vertical curve radius change mainly affects the vertical acceleration of the car body.When the vertical curve radius increases to 10000 m,it has little effect on the vertical acceleration of the car body;the change of the plane circular curve radius mainly affects the lateral acceleration of the car body.When the radius of the plane circular curve is greater than2000 m,it has little effect on the lateral acceleration of the car body.