Different Types of Continuous Track Irregularities as Sources of Train-Induced Ground Vibration and the Importance of the Random Variation of the Track Support
Irregularities of the track are a main cause of train-induced ground vibration, and track maintenance is of great importance. Although geometric irregularities at the wheel-rail contact are widely used, other types of irregularities, such as stiffness irregularities, irregularities from different tr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/3/1463 |
| _version_ | 1797489165039828992 |
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| author | Lutz Auersch |
| author_facet | Lutz Auersch |
| author_sort | Lutz Auersch |
| collection | DOAJ |
| description | Irregularities of the track are a main cause of train-induced ground vibration, and track maintenance is of great importance. Although geometric irregularities at the wheel-rail contact are widely used, other types of irregularities, such as stiffness irregularities, irregularities from different track positions and irregularities in the wave propagation, were analysed in the present study. The track behaviour was investigated by a multi-beam-on-soil model. This track model is coupled with a vehicle model to calculate the vehicle–track interaction. The track model was also used for the track filtering, which transfers a track support error to the equivalent rail irregularity or, conversely, the sharp axle pulse on the rail to a smoother pulse on the soil. In the case in which this filtering varies randomly along the track, the pulses of the moving static load induce a certain ground vibration component (“the scatter of axle pulses”). This effect was calculated by the superposition of axle pulses in the frequency domain and by a stochastic simulation. Simultaneous vehicle, track and soil measurements at a certain site were used to evaluate the different excitation and ground vibration components. The agreement between calculations and axle-box and soil measurements is good. The ground vibrations calculated from rail irregularities and corresponding dynamic loads, however, clearly underestimate the measured ground vibration amplitudes. Only the static load that is moving over a varying track support stiffness can produce the important mid-frequency ground vibration component by the scatter of axle pulses. |
| first_indexed | 2024-03-10T00:12:37Z |
| format | Article |
| id | doaj.art-f936f14eb0594c8eb4e0407f685dd3c7 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T00:12:37Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj.art-f936f14eb0594c8eb4e0407f685dd3c72023-11-23T15:58:07ZengMDPI AGApplied Sciences2076-34172022-01-01123146310.3390/app12031463Different Types of Continuous Track Irregularities as Sources of Train-Induced Ground Vibration and the Importance of the Random Variation of the Track SupportLutz Auersch0Department 7 Safety of Structures, Federal Institute of Material Research and Testing, 12200 Berlin, GermanyIrregularities of the track are a main cause of train-induced ground vibration, and track maintenance is of great importance. Although geometric irregularities at the wheel-rail contact are widely used, other types of irregularities, such as stiffness irregularities, irregularities from different track positions and irregularities in the wave propagation, were analysed in the present study. The track behaviour was investigated by a multi-beam-on-soil model. This track model is coupled with a vehicle model to calculate the vehicle–track interaction. The track model was also used for the track filtering, which transfers a track support error to the equivalent rail irregularity or, conversely, the sharp axle pulse on the rail to a smoother pulse on the soil. In the case in which this filtering varies randomly along the track, the pulses of the moving static load induce a certain ground vibration component (“the scatter of axle pulses”). This effect was calculated by the superposition of axle pulses in the frequency domain and by a stochastic simulation. Simultaneous vehicle, track and soil measurements at a certain site were used to evaluate the different excitation and ground vibration components. The agreement between calculations and axle-box and soil measurements is good. The ground vibrations calculated from rail irregularities and corresponding dynamic loads, however, clearly underestimate the measured ground vibration amplitudes. Only the static load that is moving over a varying track support stiffness can produce the important mid-frequency ground vibration component by the scatter of axle pulses.https://www.mdpi.com/2076-3417/12/3/1463train-induced ground vibrationgeometric vehicle and track irregularitiesstiffness variationmulti-beam track modeltrack filteringdynamic axle loads |
| spellingShingle | Lutz Auersch Different Types of Continuous Track Irregularities as Sources of Train-Induced Ground Vibration and the Importance of the Random Variation of the Track Support Applied Sciences train-induced ground vibration geometric vehicle and track irregularities stiffness variation multi-beam track model track filtering dynamic axle loads |
| title | Different Types of Continuous Track Irregularities as Sources of Train-Induced Ground Vibration and the Importance of the Random Variation of the Track Support |
| title_full | Different Types of Continuous Track Irregularities as Sources of Train-Induced Ground Vibration and the Importance of the Random Variation of the Track Support |
| title_fullStr | Different Types of Continuous Track Irregularities as Sources of Train-Induced Ground Vibration and the Importance of the Random Variation of the Track Support |
| title_full_unstemmed | Different Types of Continuous Track Irregularities as Sources of Train-Induced Ground Vibration and the Importance of the Random Variation of the Track Support |
| title_short | Different Types of Continuous Track Irregularities as Sources of Train-Induced Ground Vibration and the Importance of the Random Variation of the Track Support |
| title_sort | different types of continuous track irregularities as sources of train induced ground vibration and the importance of the random variation of the track support |
| topic | train-induced ground vibration geometric vehicle and track irregularities stiffness variation multi-beam track model track filtering dynamic axle loads |
| url | https://www.mdpi.com/2076-3417/12/3/1463 |
| work_keys_str_mv | AT lutzauersch differenttypesofcontinuoustrackirregularitiesassourcesoftraininducedgroundvibrationandtheimportanceoftherandomvariationofthetracksupport |