曲线线形对低地板车辆曲线通过能力的影响

Influence of curve alignment on curve negotiation performance of low floor vehicle

低地板车辆运行线路曲线半径小、曲线线形复杂,曲线通过能力是衡量低地板车辆的重要技术指标。为分析曲线线形对低地板车辆曲线通过能力的影响,文章首先讨论了低地板车辆与地铁车辆的编组结构差异和动力学建模差异,利用SIMPACK软件建立5模块低地板车辆动力学模型,从曲线线形和夹直线长度方面分别对车辆曲线通过时的脱轨系数、轮轴横向力、车间转角和车体与转向架间转角等指标进行仿真对比分析。研究表明:C曲线和S曲线对低地板车辆曲线通过性能产生明显的不利影响,当夹直线长度为2 m时,车辆在通过水平曲线半径25 m的S曲线时脱轨系数、轮轴横向力和车体与转向架的转角分别增加8.8%、43%和43%,通过C曲线时车体间转角增加8.9%;随着夹直线长度的增加,则有利于改善车辆曲线通过能力。

The track line for low floor vehicle has a small radius and complex curve alignment,and the curve negotiation performance is an important technical index to measure the low floor vehicle.In order to analyze the influence of curve alignment on the curve negotiation performance of low floor vehicle,firstly,this paper discusses the differences in composition structure and dynamic modeling between low floor vehicles and metro vehicles,and uses SIMPACK software to establish a five-module low floor vehicle dynamics model.In terms of curve alignment and the length of intermediate straight-line,the derailment coefficient,the lateral force per wheelset,the angle between two car bodies,and the angle between the car body and the bogie are simulated and analyzed comparatively.The research indicates that the C-curve and the S-curve have obvious adverse effects on the curve negotiation performance of the low floor vehicle.The derailment coefficient,the lateral force per wheelset and the angle between the vehicle body and the bogie increases by 8.8%,43% and 43% respectively when the low floor vehicle passes the S-curve with a horizontal curve radius of 25 m and the intermediate straight-line length of 2 m,and the angle between two car bodies also increases by 8.9% when the low floor vehicle passes the C-curve with a horizontal curve radius of 25 m and the intermediate straight-line length of 2 m.As the length of intermediate straight-line increases,it is beneficial to improve the curve negotiation performance of low floor vehicle.