Analysis on fracture causes of SKL15 fastener clips in high-speed railway

YANG Xinwen; ZHANG Yingjie; LIU Shutong; WANG Xiaohua

doi:10.11918/202111092

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Analysis on fracture causes of SKL15 fastener clips in high-speed railway

更新时间：2026-10-19

- Analysis on fracture causes of SKL15 fastener clips in high-speed railway
- Vol. 55, Issue 3, Pages: 10-19(2023)
- 作者机构：
  
  1. 上海市轨道交通结构耐久与系统安全重点实验室(同济大学),上海,201804
  2. Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety (Tongji University),Shanghai,China,201804
  3. 道路与交通工程教育部重点实验室(同济大学),上海,201804
  4. Key Laboratory of Road and Traffic Engineering of Ministry of Education (Tongji University),Shanghai,China,201804
  5. 中国铁路上海局集团有限公司合肥工务段,合肥,230031
- 作者简介：
- 基金信息：
- DOI：10.11918/202111092
  CLC： U213.5;U238
- Published：2023
- 稿件说明：
移动端阅览
YANG Xinwen, ZHANG Yingjie, LIU Shutong, et al. Analysis on fracture causes of SKL15 fastener clips in high-speed railway[J]. 2023, 55(3): 10-19.
DOI：

YANG Xinwen, ZHANG Yingjie, LIU Shutong, et al. Analysis on fracture causes of SKL15 fastener clips in high-speed railway[J]. 2023, 55(3): 10-19. DOI： 10.11918/202111092.

摘要

为了分析高速铁路运营线路扣件弹条断裂原因

以SKL15型弹条为研究对象

采用现场测试与仿真分析相结合的方法进行研究。首先

现场调查线路的波磨情况与弹条的振动响应特性；其次

建立扣件系统有限元模型

分析弹条在自由状态和安装状态下的模态特征

并进行基于模态叠加法的谐响应分析

通过对比现场测试结果和仿真结果

证明模型的可靠性；最后

结合测试结果和线路运营情况

分析造成弹条断裂的原因并提出整治措施。结果表明:造成弹条断裂的主要原因是列车以120 km/h的时速通过显著波长为50~60 mm的波磨区段时所激发的载荷频率与安装状态下的弹条模态频率（550~650 Hz）十分接近

从而引起弹条强烈的共振作用

导致弹条跟端应力显著增大

最终引发疲劳损伤。针对这一原因

提出了如钢轨打磨、列车调速、弹条结构优化等一系列解决方法。

Abstract

To analyze the reasons for the fracture of fastener clips in high-speed railway operating lines

SKL15 clips were studied as the object using a method of combining field test and simulation analysis. First

an on-site investigation of rail corrugation and vibration response characteristics of clips was performed. Then

a finite element model of the fastening system was established. The modal characteristics of the clips in their free and assembly states were analyzed

and a harmonic response analysis was carried out based on the modal superposition method. The reliability of the model was proved by comparing the field test results with the simulation results. Finally

in combination with the test results and the railway operation situation

the fracture causes of the fastener clips were analyzed

and remedial measures were put forward. Results showed that the main reason for the fracture of clips was that the load frequency excited when the train passed through the corrugation section with a significant wavelength of 50-60 mm at a speed of 120 km/h was very close to the modal frequency (550–650 Hz) of the clips in the assembly state

which caused the clips to have a strong resonance effect and resulted in the significant increase in the stress at the heel end of the clips

and eventually

fatigue damage. As a result

some solutions were put forward

such as rail grinding

train speed adjustment

and clip structural optimization.

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