Virtual homologation of high-speed trains in railway tunnels: A new iterative numerical approach for train-tunnel pressure signature
Large overpressures can be produced when a high-speed train enters and crosses a railway tunnel. Predicting them is important since, in critical conditions, pressure variations may be dangerous for train structures and for passengers’ health and comfort. European regulations impose pressure thresholds which trains must comply with in order to be homologated for travelling through tunnels. Currently, full-scale tests are required to demonstrate respect of these prescriptions. In this work, a procedure for calculating the pressure variations inside the tunnel based on 3 D steady computational fluid dynamics (CFD) simulations and a 1 D compressible fluid-dynamics model is proposed, to be used both as a design tool and for virtual homologation of new rolling stock. Results of a large experimental campaign performed on the Italian high-speed line are used to set-up the proposed methodology and to validate it. Different train geometries, tunnel crossing speeds and tunnel initial air conditions are considered.
- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/09544097
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Supplemental Notes:
- © IMechE 2021.
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Authors:
- Brambilla, E
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0000-0002-9478-586X
- Schito, Paolo
- Somaschini, Claudio
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0000-0002-3762-041X
- Rocchi, Daniele
- Publication Date: 2022-5
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 511-531
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Serial:
- Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
- Volume: 236
- Issue Number: 5
- Publisher: Sage Publications Limited
- ISSN: 0954-4097
- EISSN: 2041-3017
- Serial URL: http://pif.sagepub.com/content/current
Subject/Index Terms
- TRT Terms: Fluid dynamics; High speed rail; Pressure; Railroad tunnels
- Geographic Terms: Italy
- Subject Areas: Bridges and other structures; Railroads;
Filing Info
- Accession Number: 01847554
- Record Type: Publication
- Files: TRIS
- Created Date: May 31 2022 9:14AM