城市轨道交通减振轨道DI型弹条断裂原因分析及治理效果
段勇奇1廖志军2周波2陈凌志2王子毓2张明兰1
Fracture Cause Analysis and Treatment Effect for Urban Rail Transit Vibration Damping Track DI-type Elastic Strip
DUAN Yongqi1LIAO Zhijun2ZHOU Bo2CHEN Lingzhi2WANG Ziyu2ZHANG Minglan1
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作者信息:1.洛阳双瑞橡塑科技有限公司，471031，洛阳
2.杭州地铁运营有限公司，310017，杭州
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Affiliation:1.Luoyang Sunrui Rubber & Plastic Science and Technology Co., Ltd., 471031, Luoyang, China
2.Hangzhou Metro Operation Co., Ltd., 310017, Hangzhou, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.08.010
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中图分类号/CLCN:U213.5+31
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栏目/Col:研究报告
摘要:
［目的］弹条是减振轨道扣件中的关键部件，其力学性能及承受疲劳载荷性能关系到城市轨道交通列车运行安全及轨道使用寿命。针对目前弹条失效破坏频发的情况，有必要对其断裂原因进行分析并制定合理治理措施。［方法］以某城市轨道交通线路某区段出现弹条集中断裂的情况为依托，通过弹条断口分析确定弹条的断裂类型为疲劳断裂，通过分析弹条的化学成分和物理性能未发现异常状态，通过仿真分析和试验分析得到弹条的固有频率。结合弹条断裂区段轨道动态测试得到轨道和弹条的振动特性，由此确定轨道波磨可能是引起弹条出现反复断裂的主要原因。针对该原因制定了合理的治理措施，对治理前后的弹条断裂数量进行了统计。［结果及结论］钢轨打磨措施有效抑制了轨道波磨，大大减少了弹条断裂情况的发生，进一步佐证了轨道波磨是引起弹条断裂的主要原因。
Abstracts:
［Objective］ Elastic strip is a critical component of rail vibration reduction fasteners, its mechanical performance and fatigue-load bearing capacity are crucial for urban rail transit train operational safety and track service life. Given the frequent occurrence of elastic strip failures, it is necessary to analyze the fracture causes and develop reasonable treatment measures. ［Method］ Based on the concentrated fracture of elastic strips in an urban rail transit line section, the fracture type of elastic strips is determined as fatigue fracture through analysis of the breakage. Since chemical composition and physical property analysis of elastic strips fails to reveal any abnormal conditions, the natural frequency of the elastic strips is obtained through simulation and experimental analysis. The vibration characteristics of the track and elastic strips are determined through track dynamic testing in elastic strip fractured section. Based on this, rail corrugation is identified as the main cause of repeated elastic strip fractures. Reasonable treatment measures are formulated accordingly, and the number of elastic strip fractures before and after treatment is statistically analyzed. ［Result & Conclusion］ Rail grinding measures can effectively suppress rail corrugation, significantly reducing elastic strip fracture occurrence, further confirming rail corrugation as the main cause of elastic strip fractures.
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