地铁线路曲线段钢弹簧隔振器失效对列车运行安全影响分析
朱梅韩翔宇尹大伟李嘉怡赵树峰
Impact Analysis of Steel Spring Vibration Isolator Failure in Metro Line Curved Sections on Train Operation Safety
ZHU MeiHAN XiangyuYIN DaweiLI JiayiZHAO Shufeng
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作者信息:济南市交通工程质量与安全中心， 250399， 济南
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Affiliation:Jinan Traffic Engineering Quality and Safety Center, 250399, Jinan, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.05.031
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中图分类号/CLCN:U213.2+3
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栏目/Col:运营管理
摘要:
［目的］在浮置板轨道小半径曲线段，列车和轨道具有更复杂的动力响应特性。浮置板轨道系统中钢弹簧隔振器不仅起到减振作用，而且还对保证列车安全运行至关重要。因此，有必要深入研究钢弹簧隔振器局部失效对小半径曲线预制式浮置板轨道结构及列车运行安全的影响。［方法］以某地铁线路预制式浮置板轨道为例，采用ABAQUS有限元软件建立了车辆-浮置板轨道-隧道耦合动力学模型，并通过实测数据验证了模型的有效性。根据所建立的模型，计算隔振器失效前后列车和轨道结构动态响应,并分析轨道结构及行车安全性指标的变化。此外，讨论了隔振器失效对剪力铰受力情况的影响，并校核了其强度。［结果及结论］轮重减载率和脱轨系数虽然有所增加，但满足相关规范要求，说明列车在隔振器失效时仍可维持运行安全性。隔振器失效导致轨道刚度降低，使得轨道结构动态位移显著增加，超出相关规范限值。上置式剪力铰在隔振器失效后受力显著增大，尽管满足强度要求但仍需加强对其监测。
Abstracts:
［Objective］In the small-radius curved sections of floating slab tracks, trains and tracks exhibit more complex dynamic response characteristics. The steel spring vibration isolators in the floating slab track system not only play a role in vibration reduction but are also crucial for ensuring the safe operation of trains. Therefore, it is necessary to study thoroughly the impact of the local failure of steel spring vibration isolators on the prefabricated floating slab track structure in small-radius curved section and the operation safety of trains.［Method］Taking the prefabricated floating slab track of a certain metro line as an example, the ABAQUS finite element software is used to establish a coupled vehicle, floating slab track and tunnel dynamic model, and the validity of the model is verified through measured data. According to the established model, the dynamic responses of the train and the track structure before and after the vibration isolator failure are calculated, and the changes in the track structure and the indicators of train operation safety are analyzed. In addition, the impact of the vibration isolator failure on the force condition of the shear hinges is discussed, and their strength is checked and adjusted.［Result & Conclusion］Although the wheel load reduction rate and the derailment coefficient have increased, they meet the requirements of relevant specifications, indicating that the train can still maintain operation safety when the vibration isolators fail. The failure of the vibration isolators leads to a decrease in the track stiffness, resulting in a significant increase in the dynamic displacement of the track structure, which exceeds the limits specified in relevant specifications. Since the force on the upper-mounted shear hinge will increase significantly after the vibration isolators failure, despite meeting the strength requirements, it is still necessary to strengthen the monitoring of the shear hinge.
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