Case Study: Correlations Between Curve Squeal, Weather Conditions, and Traction in a Tram Loop
This study explores the relationship between the coefficient of traction (CoT) and squeal noise parameters on a tram line loop, focusing on the influence of weather conditions. An automatic noise module was placed near a tram loop known for noise complaints. This module distinguishes between squeal...
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| Format: | Article |
| Language: | English |
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University of Kragujevac
2024-12-01
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| Series: | Tribology in Industry |
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| Online Access: | https://www.tribology.rs/journals/2024/2024-4/2024-4-12.html |
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| author | Martin Valena Milan Omasta Milan Klapka Radovan Galas Vaclav Navratil Ivan Krupka Martin Hartl |
| author_facet | Martin Valena Milan Omasta Milan Klapka Radovan Galas Vaclav Navratil Ivan Krupka Martin Hartl |
| author_sort | Martin Valena |
| collection | DOAJ |
| description | This study explores the relationship between the coefficient of traction (CoT) and squeal noise parameters on a tram line loop, focusing on the influence of weather conditions. An automatic noise module was placed near a tram loop known for noise complaints. This module distinguishes between squeal and flange noise, recording their duration, root mean square (RMS) sound pressure level, and maximum sound pressure level when a threshold in the appropriate frequency band is exceeded. Concurrently, weather conditions were monitored, and the CoT on the rail was measured using a BUT rail tribometer. The findings reveal a notable correlation between the CoT and the duration of squeal noise, while the association with sound pressure levels was less pronounced. An increase in CoT was observed with rising relative humidity, which may be attributed to increasing temperature throughout a sunny April day, while absolute humidity remained almost constant. Furthermore, noise parameters rose with higher relative humidity and showed an inverse relationship with temperature. These findings suggest that weather conditions, particularly relative humidity and temperature, influence both the CoT and noise parameters on tram lines. |
| format | Article |
| id | doaj-art-be05e7eccd384590809df0bda09cb4ef |
| institution | Kabale University |
| issn | 0354-8996 2217-7965 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | University of Kragujevac |
| record_format | Article |
| series | Tribology in Industry |
| spelling | doaj-art-be05e7eccd384590809df0bda09cb4ef2025-01-09T11:07:27ZengUniversity of KragujevacTribology in Industry0354-89962217-79652024-12-0146469570810.24874/ti.1728.07.24.10Case Study: Correlations Between Curve Squeal, Weather Conditions, and Traction in a Tram LoopMartin Valena0https://orcid.org/0000-0002-2423-3170Milan Omasta1https://orcid.org/0000-0002-1448-3731Milan Klapka2https://orcid.org/0000-0002-6503-6085Radovan Galas3https://orcid.org/0000-0001-7364-899XVaclav Navratil4https://orcid.org/0000-0002-5248-4487Ivan Krupka5https://orcid.org/0000-0002-9936-7480Martin Hartl6https://orcid.org/0000-0001-5432-6645Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69 Brno, Czechia.Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69 Brno, Czechia.Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69 Brno, Czechia.Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69 Brno, Czechia.Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69 Brno, Czechia.Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69 Brno, Czechia.Faculty of Mechanical Engineering, Brno University of Technology, Technicka 2896/2, 616 69 Brno, Czechia.This study explores the relationship between the coefficient of traction (CoT) and squeal noise parameters on a tram line loop, focusing on the influence of weather conditions. An automatic noise module was placed near a tram loop known for noise complaints. This module distinguishes between squeal and flange noise, recording their duration, root mean square (RMS) sound pressure level, and maximum sound pressure level when a threshold in the appropriate frequency band is exceeded. Concurrently, weather conditions were monitored, and the CoT on the rail was measured using a BUT rail tribometer. The findings reveal a notable correlation between the CoT and the duration of squeal noise, while the association with sound pressure levels was less pronounced. An increase in CoT was observed with rising relative humidity, which may be attributed to increasing temperature throughout a sunny April day, while absolute humidity remained almost constant. Furthermore, noise parameters rose with higher relative humidity and showed an inverse relationship with temperature. These findings suggest that weather conditions, particularly relative humidity and temperature, influence both the CoT and noise parameters on tram lines.https://www.tribology.rs/journals/2024/2024-4/2024-4-12.htmlwheel-rail tribologysqueal and flange noiseportable rail tribometerweather conditionscoefficient of traction |
| spellingShingle | Martin Valena Milan Omasta Milan Klapka Radovan Galas Vaclav Navratil Ivan Krupka Martin Hartl Case Study: Correlations Between Curve Squeal, Weather Conditions, and Traction in a Tram Loop Tribology in Industry wheel-rail tribology squeal and flange noise portable rail tribometer weather conditions coefficient of traction |
| title | Case Study: Correlations Between Curve Squeal, Weather Conditions, and Traction in a Tram Loop |
| title_full | Case Study: Correlations Between Curve Squeal, Weather Conditions, and Traction in a Tram Loop |
| title_fullStr | Case Study: Correlations Between Curve Squeal, Weather Conditions, and Traction in a Tram Loop |
| title_full_unstemmed | Case Study: Correlations Between Curve Squeal, Weather Conditions, and Traction in a Tram Loop |
| title_short | Case Study: Correlations Between Curve Squeal, Weather Conditions, and Traction in a Tram Loop |
| title_sort | case study correlations between curve squeal weather conditions and traction in a tram loop |
| topic | wheel-rail tribology squeal and flange noise portable rail tribometer weather conditions coefficient of traction |
| url | https://www.tribology.rs/journals/2024/2024-4/2024-4-12.html |
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