Connection Between Track Geometry Quality and Dynamic Vehicle Response at Various Speeds
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...
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| Language: | English |
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Riga Technical University Press
2023-09-01
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| Series: | The Baltic Journal of Road and Bridge Engineering |
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| Online Access: | https://bjrbe-journals.rtu.lv/article/view/7889 |
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| author | Csaba Ágh |
| author_facet | Csaba Ágh |
| author_sort | Csaba Ágh |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-baa87115eb7746d79ef8d295b14e5796 |
| institution | Kabale University |
| issn | 1822-427X 1822-4288 |
| language | English |
| publishDate | 2023-09-01 |
| publisher | Riga Technical University Press |
| record_format | Article |
| series | The Baltic Journal of Road and Bridge Engineering |
| spelling | doaj-art-baa87115eb7746d79ef8d295b14e57962025-01-02T23:17:19ZengRiga Technical University PressThe Baltic Journal of Road and Bridge Engineering1822-427X1822-42882023-09-0118316918710.7250/bjrbe.2023-18.6133373Connection Between Track Geometry Quality and Dynamic Vehicle Response at Various SpeedsCsaba Ágh0Doctoral School of Multidisciplinary Engineering Sciences, Széchenyi István University, Győr, HungaryTrack 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.https://bjrbe-journals.rtu.lv/article/view/7889axle box accelerationestimation functionsecond spatial derivativetrack geometryvehicle responsevehicle-track forces |
| spellingShingle | Csaba Ágh Connection Between Track Geometry Quality and Dynamic Vehicle Response at Various Speeds The Baltic Journal of Road and Bridge Engineering axle box acceleration estimation function second spatial derivative track geometry vehicle response vehicle-track forces |
| title | Connection Between Track Geometry Quality and Dynamic Vehicle Response at Various Speeds |
| title_full | Connection Between Track Geometry Quality and Dynamic Vehicle Response at Various Speeds |
| title_fullStr | Connection Between Track Geometry Quality and Dynamic Vehicle Response at Various Speeds |
| title_full_unstemmed | Connection Between Track Geometry Quality and Dynamic Vehicle Response at Various Speeds |
| title_short | Connection Between Track Geometry Quality and Dynamic Vehicle Response at Various Speeds |
| title_sort | connection between track geometry quality and dynamic vehicle response at various speeds |
| topic | axle box acceleration estimation function second spatial derivative track geometry vehicle response vehicle-track forces |
| url | https://bjrbe-journals.rtu.lv/article/view/7889 |
| work_keys_str_mv | AT csabaagh connectionbetweentrackgeometryqualityanddynamicvehicleresponseatvariousspeeds |