客运专线竖曲线与平面曲线重叠的试验验证

客运专线线路参数设置的合理与否,直接关系到列车运行的平稳性和旅客舒适度,而在试验列车运行条件下进行的轮轨力测试和列车运行平稳性试验是验证线路参数设置合理与否的主要手段。秦沈客运专线是我国第一条时速200 km的客运专线,对设计中采用参数合理性的实验验证是必不可少的。本文叙述了4 个半径为20 000 m的竖曲线与半径为5 500 m、7 000 m和9 000 m的平面曲线重叠条件下,轮轨作用力和列车通过时车体加速度和平稳性指标的测试过程和结果。分析表明,曲线超高应根据列车运行速度设置,以减小未被平衡的横向离心力。根据测试数据得出在试验列车250 km/h速度条件下通过这4个竖圆重叠区段是安全的,列车的舒适度达到良限值,说明竖曲线对行车影响并不十分明显。

Test of Vertical Curve Overlapping Plane Curve for Dedicated Passenger Traffic Railway Line

Whether the line parameters of dedicated passenger traffic lines are chosen reasonably affects directly the train running stability and degree of passenger comfort. Track tests for measurement of the wheel/rail force and train running stability under test train running conditions are the main means to verify whether the line parameters are rationalized or not. The Qinhuangdao-Shenyang Railway is the first Passenger line running at 200 km/h in China. It's design parameters rationality was verified as an essential procedure. The wheel/rail force, car body acceleration and train running stability were measured while the test train ran through the sections where four vertical curves each of radius 20000m overlapped the plane curves of radius 5500m, 7000m and 9000m. The superelevation should be adjusted properly against the actual train running speed so as to reduce the unbalanced lateral centrifugal force. The test data show that at 250 km/h through the four overlapping sections the test train runs safely and the passenger comfort reaches the good limit value (the good stability coefficient limit being 2.75). The vertical curve is known to have little influence on train running.