Finite Element Analysis of Metro Rail Clip Spring Bar Fracture under Short-wavelength Corrugation
[Objective] To reduce the impact of rail clip spring bar failure on metro train operation safety, the effect of short-wavelength corrugation on the service performance of rail clip spring bars is investigated and improvement measures to mitigate the clip defects are explored. [Method] Field survey i...
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| Format: | Article |
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Urban Mass Transit Magazine Press
2025-06-01
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| Series: | Chengshi guidao jiaotong yanjiu |
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| Online Access: | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.20230496.html |
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| author | GUAN Qinghua ZHANG Han JIAO Pengyu LI Wei ZHAO Yang NI Lei LI Bingbing |
| author_facet | GUAN Qinghua ZHANG Han JIAO Pengyu LI Wei ZHAO Yang NI Lei LI Bingbing |
| author_sort | GUAN Qinghua |
| collection | DOAJ |
| description | [Objective] To reduce the impact of rail clip spring bar failure on metro train operation safety, the effect of short-wavelength corrugation on the service performance of rail clip spring bars is investigated and improvement measures to mitigate the clip defects are explored. [Method] Field survey is conducted focusing on the rail clip spring bar service conditions in an urban metro network, the failure modes and occurrence probability of rail clip spring bars are summarized, and the line characteristics prone to such failures are analyzed. A refined finite element model of the DT-III fastener is developed to calculate the vibration modes of rail clip spring bars and the maximum stress location under installation conditions. [Result & Conclusion] Under normal service conditions, significant equivalent stresses of the rail clip spring bars are located on the inner side of the small arc, near the middle limb connection and the iron baseplate respectively. In the installed state, the first-order natural frequency of rail clip spring bars is 642 Hz, which coincides with the passing frequency corresponding to the measured rail corrugation wavelength of 32 mm. The maximum first principal tensile stress occurs on the inner side of the small arc at the middle limb connection of the rail clip spring bar, which is consistent with the actual fracture position observed in the field. Therefore, the short-wavelength corrugation is identified as the main factor introducing rail clip spring bar fracture. It is recommended to strictly control the corrugation within the wavelength range of 30-50 mm to improve the service conditions of rail clip spring bars. |
| format | Article |
| id | doaj-art-2d2a5060c3324af593eb37a8fc227594 |
| institution | Kabale University |
| issn | 1007-869X |
| language | zho |
| publishDate | 2025-06-01 |
| publisher | Urban Mass Transit Magazine Press |
| record_format | Article |
| series | Chengshi guidao jiaotong yanjiu |
| spelling | doaj-art-2d2a5060c3324af593eb37a8fc2275942025-08-20T03:29:23ZzhoUrban Mass Transit Magazine PressChengshi guidao jiaotong yanjiu1007-869X2025-06-01286111410.16037/j.1007-869x.20230496Finite Element Analysis of Metro Rail Clip Spring Bar Fracture under Short-wavelength CorrugationGUAN Qinghua0ZHANG Han1JIAO Pengyu2LI Wei3ZHAO Yang4NI Lei5LI Bingbing6State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, 610031, Chengdu, ChinaState Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, 610031, Chengdu, ChinaZhengzhou Metro Group Co., Ltd., 450007, Zhengzhou, ChinaState Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, 610031, Chengdu, ChinaZhengzhou Metro Group Co., Ltd., 450007, Zhengzhou, ChinaZhengzhou Metro Group Co., Ltd., 450007, Zhengzhou, ChinaZhengzhou Metro Group Co., Ltd., 450007, Zhengzhou, China[Objective] To reduce the impact of rail clip spring bar failure on metro train operation safety, the effect of short-wavelength corrugation on the service performance of rail clip spring bars is investigated and improvement measures to mitigate the clip defects are explored. [Method] Field survey is conducted focusing on the rail clip spring bar service conditions in an urban metro network, the failure modes and occurrence probability of rail clip spring bars are summarized, and the line characteristics prone to such failures are analyzed. A refined finite element model of the DT-III fastener is developed to calculate the vibration modes of rail clip spring bars and the maximum stress location under installation conditions. [Result & Conclusion] Under normal service conditions, significant equivalent stresses of the rail clip spring bars are located on the inner side of the small arc, near the middle limb connection and the iron baseplate respectively. In the installed state, the first-order natural frequency of rail clip spring bars is 642 Hz, which coincides with the passing frequency corresponding to the measured rail corrugation wavelength of 32 mm. The maximum first principal tensile stress occurs on the inner side of the small arc at the middle limb connection of the rail clip spring bar, which is consistent with the actual fracture position observed in the field. Therefore, the short-wavelength corrugation is identified as the main factor introducing rail clip spring bar fracture. It is recommended to strictly control the corrugation within the wavelength range of 30-50 mm to improve the service conditions of rail clip spring bars.https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.20230496.htmlmetrorail clip spring bar fracturerail short-wavelength corrugation |
| spellingShingle | GUAN Qinghua ZHANG Han JIAO Pengyu LI Wei ZHAO Yang NI Lei LI Bingbing Finite Element Analysis of Metro Rail Clip Spring Bar Fracture under Short-wavelength Corrugation Chengshi guidao jiaotong yanjiu metro rail clip spring bar fracture rail short-wavelength corrugation |
| title | Finite Element Analysis of Metro Rail Clip Spring Bar Fracture under Short-wavelength Corrugation |
| title_full | Finite Element Analysis of Metro Rail Clip Spring Bar Fracture under Short-wavelength Corrugation |
| title_fullStr | Finite Element Analysis of Metro Rail Clip Spring Bar Fracture under Short-wavelength Corrugation |
| title_full_unstemmed | Finite Element Analysis of Metro Rail Clip Spring Bar Fracture under Short-wavelength Corrugation |
| title_short | Finite Element Analysis of Metro Rail Clip Spring Bar Fracture under Short-wavelength Corrugation |
| title_sort | finite element analysis of metro rail clip spring bar fracture under short wavelength corrugation |
| topic | metro rail clip spring bar fracture rail short-wavelength corrugation |
| url | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.20230496.html |
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