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Evaluating the Effect of Rail Fastener Failure on Dynamic Responses of Train-Ballasted Track-Subgrade Coupling System
Yuanjie Xiao1,2, Zhenxing Chang1, Jianfeng Mao1
1School of Civil Engineering, Central South University, Changsha 410075, China.
Materials (Basel, Switzerland)
|April 12, 2022
Summary
Rail fastener failures in high-speed railways critically impact track safety and longevity. Consecutive double-side fastener failure poses the greatest risk, necessitating timely maintenance to prevent further track deterioration.
Area of Science:
- Civil Engineering
- Railway Engineering
- Mechanical Engineering
Background:
- Rail fasteners are crucial for high-speed railway ballasted track integrity.
- Fastener system failure disrupts load transmission, endangering operational safety and track longevity.
Purpose of the Study:
- To investigate the dynamic effects of various rail fastener failure patterns on ballasted track systems.
- To analyze the impact on train running stability and overall operation safety.
Main Methods:
- Established a 3D numerical model integrating multibody dynamics (MBD) and finite element method (FEM).
- Conducted numerical simulations to assess fastener failure impacts.
Main Results:
- Failure impact order: consecutive double-side > consecutive single-side > alternate single-side.
- Increased fastener failures widen the influence range on track dynamics.
- Hysteresis observed in fastener failure influence, highlighting areas needing inspection.
Conclusions:
- Consecutive fastener failures demand immediate maintenance to avert severe track degradation.
- Findings support smart track condition assessment and condition-based maintenance strategies.
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