重庆轨道交通1号线低频晃车原因分析及整治措施
张雁珍1王文斌2周潇3戴源廷2朱彬2
Cause Analysis and Rectification Measures of Chongqing Rail Transit Line 1 Low-frequency Train Oscillation
ZHANG Yanzhen1WANG Wenbin2ZHOU Xiao3DAI Yuanting2ZHU Bin2
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作者信息:1.重庆城市交通开发投资(集团)有限公司，400013，重庆
2.中国铁道科学研究院集团有限公司，100081，北京
3.重庆市轨道交通(集团)有限公司，401120，重庆
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Affiliation:1.Chongqing City Transportation Development & Investment Group Co., Ltd., 400013, Chongqing, China
2.China Academy of Railway Sciences Group Co., Ltd., 100081, Beijing, China
3.Chongqing Rail Transit (Group) Co., Ltd., 401120, Chongqing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.08.006
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中图分类号/CLCN:U213.4+2；U270.1+1
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栏目/Col:研究报告
摘要:
［目的］为解决重庆轨道交通1号线(以下简称“1号线”)低频晃车问题，需对晃车原因进行分析，并制定相应的整治措施。［方法］从晃车特征、轨道几何状态、桥梁振动及钢轨廓形变化等方面对1号线低频晃车原因进行了分析，制定了钢轨打磨措施。从线路和车辆两方面探讨了钢轨周期性磨耗的产生原因，提出解决钢轨周期性磨耗导致晃车问题的措施。［结果及结论］1号线低频晃车原因为：轨道几何不平顺和桥梁振动未直接导致车辆异常晃动；钢轨廓形存在波长约为12m的周期性变化，车速较高时，在钢轨廓形周期性变化作用下，车辆频率为2Hz的横向固有模态被激发，导致车体剧烈晃动。通过钢轨打磨方案，打磨后车辆运行平稳性指标相对打磨前降低了0.5左右，打磨区段内车辆运行平稳性指标均在限值2.5以内，晃车问题得到缓解。轨道几何不平顺较大，以及车辆的抗激扰性能较低是钢轨产生周期性磨耗的原因。通过钢轨铣磨配合轨道精调的措施可彻底解决钢轨周期性磨耗导致的晃车问题。
Abstracts:
［Objective］ To address the issue of low-frequency train oscillation on Chongqing Rail Transit Line 1 (hereinafter as ′Line 1′), it is necessary to analyze the causes of the oscillation and formulate appropriate rectification measures. ［Method］ The causes of low-frequency train oscillation on Line 1 are analyzed by examining oscillation characteristics, track geometry, bridge vibration, and rail profile changes, rail grinding measures are formulated. The causes of periodic rail wear from both track and vehicle perspectives are explored, and measures to address train oscillation caused by periodic rail wear are proposed. ［Result & Conclusion］ The causes of low-frequency train oscillation on Line 1 include: track geometry irregularities and bridge vibrations that do not directly cause abnormal vehicle oscillation; since the rail profile exhibiting periodic changes with a wavelength of approximately 12 meters, at higher train speeds and under rail profile periodic variation action, the lateral natural mode with a vehicle frequency of 2 Hz will be activated, leading to severe carbody oscillation. Through the rail grinding plan, the vehicle operation stability index after grinding decreases by about 0.5 compared to before grinding, with all the stability indices within the grinding section remaining below the limit of 2.5, thus alleviating the oscillation problem. The significant track geometry irregularities and the vehicle poor disturbance-resistant performance are identified as causes of periodic rail wear. The combination of rail milling and track fine adjustment measures can completely resolve the train oscillation issue caused by periodic rail wear.
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