Connection Between Track Geometry Quality and Dynamic Vehicle Response at Various Speeds

IF 0.6 4区 工程技术 Q4 ENGINEERING, CIVIL Baltic Journal of Road and Bridge Engineering Pub Date : 2023-09-26 DOI:10.7250/bjrbe.2023-18.613
Csaba Ágh
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Abstract

Track geometry measurements are widely used for describing track quality. However, derailments and track deterioration are caused by forces arising in vehicle-track system. This research focuses on two types of vehicle response. Firstly, the influence of the longitudinal level irregularities on the vertical wheel-rail forces was examined. Secondly, the correlation between the lateral axle box acceleration and the cross level irregularities was investigated. Track geometry and vehicle response data were acquired simultaneously by a track recording car, formed from a passenger car, at various speeds up to 130 km/h. Vehicle-track forces were calculated based on accelerometers mounted on the car body, bogies and axle boxes, considering mass and moment of inertia. Non-linear regressions resulted in vertical vehicle-track force estimation functions. It was proven that the use of second spatial derivatives of the longitudinal level gave a better estimation than the use of reference TQIs according to European Standard EN 13848-6. A linear relationship was found between the speed and standard deviation of vertical vehicle-track forces. On straight sections with constant speed, correlation coefficients of around 0.8 were found between second spatial derivatives of cross level and lateral axle box acceleration.
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不同速度下轨道几何质量与车辆动态响应的关系
轨道几何测量被广泛用于描述轨道质量。然而,脱轨和轨道劣化是由车辆-轨道系统产生的力引起的。本研究主要针对两种类型的车辆反应。首先,研究了纵向水平不平整对轮轨垂直力的影响。其次,研究了横向轴箱加速度与横向水平不规则度的关系。轨道几何形状和车辆响应数据由一辆由乘用车组成的轨道记录车同时获取,车速最高可达130公里/小时。基于安装在车身、转向架和轴箱上的加速度计,考虑质量和转动惯量,计算了车辆轨道力。非线性回归导致垂直车辆-轨道力估计函数。根据欧洲标准EN 13848-6,证明了使用纵向水平的二阶空间导数比使用参考tqi给出了更好的估计。车速与车轨垂直力的标准差呈线性关系。在等速直线路段,横向水平二次空间导数与横向轴箱加速度的相关系数约为0.8。
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来源期刊
Baltic Journal of Road and Bridge Engineering
Baltic Journal of Road and Bridge Engineering 工程技术-工程:土木
CiteScore
2.10
自引率
9.10%
发文量
25
审稿时长
>12 weeks
期刊介绍: THE JOURNAL IS DESIGNED FOR PUBLISHING PAPERS CONCERNING THE FOLLOWING AREAS OF RESEARCH: road and bridge research and design, road construction materials and technologies, bridge construction materials and technologies, road and bridge repair, road and bridge maintenance, traffic safety, road and bridge information technologies, environmental issues, road climatology, low-volume roads, normative documentation, quality management and assurance, road infrastructure and its assessment, asset management, road and bridge construction financing, specialist pre-service and in-service training;
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