Drive-by detection of railway track stiffness variation using in-service vehicles
| Autor: | Eugene J. O'Brien, Daniel Cantero, Paraic Quirke, Cathal Bowe |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Track
Service (systems architecture) Engineering Drive-by Property (programming) Railway 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Track (rail transport) Stiffness 0201 civil engineering medicine Cross entropy 021101 geological & geomatics engineering Measure (data warehouse) business.industry Mechanical Engineering Structural engineering Identification (information) Vehicle track interaction Train medicine.symptom business |
| Zdroj: | Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit |
| ISSN: | 0954-4097 |
| Popis: | Railway track stiffness is an important track property which can help with the identification of maintenance related problems. Railway track stiffness can currently be measured using stationary equipment or specialised low-speed vehicles. The concept of using trains in regular service to measure track stiffness has the potential to provide inexpensive daily ‘drive-by’ track monitoring to complement data collected by less-frequent monitoring techniques. A method is proposed in this paper for the detection of track stiffness variation through an analysis of vehicle accelerations resulting from the vehicle–track dynamic interaction. The cross-entropy optimisation technique is applied to determine the track stiffness profile, which generates a vehicle response that best fits the measured vertical accelerations of a railway carriage bogie. Numerical validation of the concept is achieved by using a two-dimensional half-bogie dynamic model, representing a railway vehicle, to infer a global track stiffness profile along a track. The track stiffness measurement algorithm is implemented in Matlab. This paper reports the results of the numerical simulations. The proposed method gives good estimates of the track stiffness. To the authors’ knowledge, this is the first time an optimisation technique has been applied to the determination of railway track stiffness. © 2016. This is the authors' accepted and refereed manuscript to the article. The final authenticated version is available online at: http://journals.sagepub.com/doi/10.1177/0954409716634752 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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