Identification method of wheel-rail two-point contact state in switch area
Abstract Two-point contact is one of the fundamental problems of wheel-rail contact in switch area. The contact state and the distribution of forces are complex and essential points in wheel-rail relationship. Given the problem that the current dynamic wheel-rail contact state is challenging to dete...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-85687-8 |
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| author | Ping Lu Xinyi Li Dabin Cui Boyang An Wenpeng Jiang |
| author_facet | Ping Lu Xinyi Li Dabin Cui Boyang An Wenpeng Jiang |
| author_sort | Ping Lu |
| collection | DOAJ |
| description | Abstract Two-point contact is one of the fundamental problems of wheel-rail contact in switch area. The contact state and the distribution of forces are complex and essential points in wheel-rail relationship. Given the problem that the current dynamic wheel-rail contact state is challenging to detect, a theory to detect the two-point contact state of the wheel-rail in switch area using a discrete gauge column was presented and proved in the finite element model. This paper derived the relationship between strain gauge position and stress using a modified rail model. The patch scheme was determined using the rail waist bending moment difference method to achieve decoupling of the bridge circuit of the force measurement columns. The bridge circuit was calibrated by means of the modified theoretical calibration method, and the circuit test data was obtained for the two-point contact condition in the switch area. The study compared the results obtained from the wheel-rail column finite model and circuit test data for two-point contact conditions, demonstrated the method’s ability to identify the two-point contact state and the wheel-rail force distribution characteristics in the switch area. The results show that the method can identify the two-point contact state in switch area and distribute characteristics of the wheel-rail force. And the wheel-rail contact point position can be deduced accurately according to the wheel-rail force. This test method provides a test verification scheme for wheel-rail two-point rolling contact theory and a new technology for the dynamic force testing of wheel-rail in switch area. |
| format | Article |
| id | doaj-art-3acea3106d764d9fa4de854a38bb6fb9 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-3acea3106d764d9fa4de854a38bb6fb92025-02-02T12:19:57ZengNature PortfolioScientific Reports2045-23222025-01-0115111810.1038/s41598-025-85687-8Identification method of wheel-rail two-point contact state in switch areaPing Lu0Xinyi Li1Dabin Cui2Boyang An3Wenpeng Jiang4Sichuan Provincial Engineering Research Center of Rail Transit Lines Smart Operation and Maintenance, Chengdu Vocational & Technical College of IndustrySchool of Mechanical Engineering, Southwest Jiaotong UniversitySchool of Mechanical Engineering, Southwest Jiaotong UniversityKey Laboratory of High-speed Railway Engineering of Ministry of Education, Southwest Jiaotong UniversitySchool of Mechanical Engineering, Southwest Jiaotong UniversityAbstract Two-point contact is one of the fundamental problems of wheel-rail contact in switch area. The contact state and the distribution of forces are complex and essential points in wheel-rail relationship. Given the problem that the current dynamic wheel-rail contact state is challenging to detect, a theory to detect the two-point contact state of the wheel-rail in switch area using a discrete gauge column was presented and proved in the finite element model. This paper derived the relationship between strain gauge position and stress using a modified rail model. The patch scheme was determined using the rail waist bending moment difference method to achieve decoupling of the bridge circuit of the force measurement columns. The bridge circuit was calibrated by means of the modified theoretical calibration method, and the circuit test data was obtained for the two-point contact condition in the switch area. The study compared the results obtained from the wheel-rail column finite model and circuit test data for two-point contact conditions, demonstrated the method’s ability to identify the two-point contact state and the wheel-rail force distribution characteristics in the switch area. The results show that the method can identify the two-point contact state in switch area and distribute characteristics of the wheel-rail force. And the wheel-rail contact point position can be deduced accurately according to the wheel-rail force. This test method provides a test verification scheme for wheel-rail two-point rolling contact theory and a new technology for the dynamic force testing of wheel-rail in switch area.https://doi.org/10.1038/s41598-025-85687-8Two-point contactForce-measuring switchContact forceContact status identification |
| spellingShingle | Ping Lu Xinyi Li Dabin Cui Boyang An Wenpeng Jiang Identification method of wheel-rail two-point contact state in switch area Scientific Reports Two-point contact Force-measuring switch Contact force Contact status identification |
| title | Identification method of wheel-rail two-point contact state in switch area |
| title_full | Identification method of wheel-rail two-point contact state in switch area |
| title_fullStr | Identification method of wheel-rail two-point contact state in switch area |
| title_full_unstemmed | Identification method of wheel-rail two-point contact state in switch area |
| title_short | Identification method of wheel-rail two-point contact state in switch area |
| title_sort | identification method of wheel rail two point contact state in switch area |
| topic | Two-point contact Force-measuring switch Contact force Contact status identification |
| url | https://doi.org/10.1038/s41598-025-85687-8 |
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