Design and Application of Portable Continuous Welded Rails Stress Homogenization Adjustment Device
［Objective］In order to timely and accurately grasp the internal stress distribution of continuous welded rails (CWR) and reduce the investment of manpower and material resources in CWR stress adjustment operations, it is necessary to study the issues of CWR stress adjustment. ［Method］The causes for...
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| Format: | Article |
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Urban Mass Transit Magazine Press
2024-12-01
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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.2024.12.017.html |
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| author | HE Xianglin LIU Ping LU Hongyao WU Wentao |
| author_facet | HE Xianglin LIU Ping LU Hongyao WU Wentao |
| author_sort | HE Xianglin |
| collection | DOAJ |
| description | ［Objective］In order to timely and accurately grasp the internal stress distribution of continuous welded rails (CWR) and reduce the investment of manpower and material resources in CWR stress adjustment operations, it is necessary to study the issues of CWR stress adjustment. ［Method］The causes for uneven temperature distribution in CWR are introduced, and the characteristics of temperature distribution in CWR are clarified by combining infrared thermal imaging technology; a portable CWR stress homogenization adjustment device is designed and applied in actual projects. ［Result & Conclusion］The random differences in locked rail temperature, and the objective differences in meteorological parameters and materials are the reasons for the uneven temperature distribution inside CWR. On the actual operating line, there is a temperature difference at the position of adjacent fasteners, with a temperature difference of 1.8 ℃, which causes a local temperature stress extreme difference of 2.77 MPa in the steel rail. The portable CWR stress homogenization adjustment device can excite the maximum acceleration value of the rail to 305.944 m/s2, and control the longitudinal fluctuation displacement value of the rail to 0.014 mm. The CWR internal stress is thus effectively released due to the high-frequency excitation. |
| format | Article |
| id | doaj-art-e83b30c377f542e4b43e7fef598888d4 |
| institution | OA Journals |
| issn | 1007-869X |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Urban Mass Transit Magazine Press |
| record_format | Article |
| series | Chengshi guidao jiaotong yanjiu |
| spelling | doaj-art-e83b30c377f542e4b43e7fef598888d42025-08-20T01:54:58ZzhoUrban Mass Transit Magazine PressChengshi guidao jiaotong yanjiu1007-869X2024-12-01271210310610.16037/j.1007-869x.2024.12.017Design and Application of Portable Continuous Welded Rails Stress Homogenization Adjustment DeviceHE Xianglin0LIU Ping1LU Hongyao2WU Wentao3Suning Branch, Guoneng Shuohuang Railway Development Co., Ltd., 062350, Hebei, ChinaSuning Branch, Guoneng Shuohuang Railway Development Co., Ltd., 062350, Hebei, ChinaShanghai Key Laboratory of Rail Infrastructure Durability and System Safety, 201804, Shanghai, ChinaSchool of Urban Rail Transportation, Shanghai University of Engineering Science, 201620, Shanghai, China［Objective］In order to timely and accurately grasp the internal stress distribution of continuous welded rails (CWR) and reduce the investment of manpower and material resources in CWR stress adjustment operations, it is necessary to study the issues of CWR stress adjustment. ［Method］The causes for uneven temperature distribution in CWR are introduced, and the characteristics of temperature distribution in CWR are clarified by combining infrared thermal imaging technology; a portable CWR stress homogenization adjustment device is designed and applied in actual projects. ［Result & Conclusion］The random differences in locked rail temperature, and the objective differences in meteorological parameters and materials are the reasons for the uneven temperature distribution inside CWR. On the actual operating line, there is a temperature difference at the position of adjacent fasteners, with a temperature difference of 1.8 ℃, which causes a local temperature stress extreme difference of 2.77 MPa in the steel rail. The portable CWR stress homogenization adjustment device can excite the maximum acceleration value of the rail to 305.944 m/s2, and control the longitudinal fluctuation displacement value of the rail to 0.014 mm. The CWR internal stress is thus effectively released due to the high-frequency excitation.https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2024.12.017.htmlcwrstress homogenizationadjustment device design |
| spellingShingle | HE Xianglin LIU Ping LU Hongyao WU Wentao Design and Application of Portable Continuous Welded Rails Stress Homogenization Adjustment Device Chengshi guidao jiaotong yanjiu cwr stress homogenization adjustment device design |
| title | Design and Application of Portable Continuous Welded Rails Stress Homogenization Adjustment Device |
| title_full | Design and Application of Portable Continuous Welded Rails Stress Homogenization Adjustment Device |
| title_fullStr | Design and Application of Portable Continuous Welded Rails Stress Homogenization Adjustment Device |
| title_full_unstemmed | Design and Application of Portable Continuous Welded Rails Stress Homogenization Adjustment Device |
| title_short | Design and Application of Portable Continuous Welded Rails Stress Homogenization Adjustment Device |
| title_sort | design and application of portable continuous welded rails stress homogenization adjustment device |
| topic | cwr stress homogenization adjustment device design |
| url | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2024.12.017.html |
| work_keys_str_mv | AT hexianglin designandapplicationofportablecontinuousweldedrailsstresshomogenizationadjustmentdevice AT liuping designandapplicationofportablecontinuousweldedrailsstresshomogenizationadjustmentdevice AT luhongyao designandapplicationofportablecontinuousweldedrailsstresshomogenizationadjustmentdevice AT wuwentao designandapplicationofportablecontinuousweldedrailsstresshomogenizationadjustmentdevice |