A5061778111- Railway Engineering and Dynamics
- Civil and Geotechnical Engineering Research
- Structural Health Monitoring Techniques
- Geotechnical Engineering and Underground Structures
- Infrastructure Maintenance and Monitoring
- Railway Systems and Energy Efficiency
- Mechanical stress and fatigue analysis
- Fatigue and fracture mechanics
- Structural Engineering and Vibration Analysis
- Simulation and Modeling Applications
- Metal Alloys Wear and Properties
- Engineering Structural Analysis Methods
- Electrical Contact Performance and Analysis
China Academy of Railway Sciences
2022-2024
Beijing Jiaotong University
2019-2021
Purpose To investigate the influence of vehicle operation speed, curve geometry parameters and rail profile on wheel–rail creepage in high-speed railway curves propose a multi-parameter coordinated optimization strategy to reduce contact fatigue damage. Design/methodology/approach Taking small-radius as research object, field measurements were conducted obtain track profiles. A coupled vehicle-track dynamics model was established. Multiple numerical experiments designed using Latin Hypercube...
High-speed railway track defects such as rail corrugation, wheel polygonal wear, and fastener clip failure are closely related to the modal frequency of structure. As operation time increases, parameters structure will change, it is necessary know what they diagnose vibration characteristics. Present methods analysis limited by measuring points excitations cannot be used extract operational track. This paper proposes a novel approach using wheel-rail identify from monitoring data. The...
During the long-term service of slab track, various external factors (such as complicated temperature) can result in a series damages. Among them, arching changes structural mechanical properties, deteriorates track geometry conditions, and even threatens operation trains. Therefore, it is necessary to detect accurately achieve effective maintenance. However, current damage detection methods cannot satisfy high accuracy low cost simultaneously, making difficult large-scale efficient...
This research elucidates the influence of 60N rail profile on dynamic interaction between wheel and rail, performance within turnout. The long-term service efficiency turnouts was scrutinized. Subsequently, an optimization approach for 60–60N combination suggested. main conclusions are as follows: (1) During passage in direction, enhances driving stability mitigates progression wear. However, it causes focalized wheel–rail contact head escalates stress. (2) branch amplifies lateral force...
The interface crack of a slab track is fracture mixed-mode that experiences complex loading–unloading–reloading process. A reasonable simulation the interaction between layers tracks key to studying crack. However, existing models disease have problems, such as stress oscillation tip and self-repairing, which do not simulate mixed mode cracks accurately. Aiming at these shortcomings, we propose an improved cohesive zone model combined with unloading/reloading relationship based on original...
Rail transit’s wheel–rail system periodically encounters defects such as wheel polygons, rail corrugation, and fastener failure, which are intricately linked to the modal parameters of track structures. Identifying these is essential for refining dynamics models, understanding defect mechanisms, detection. This study reviews current methodologies identifying structure parameters, emphasizing their significance in engineering. It categorizes various identification techniques, examines...
The problem of excessive wear pantograph strips frequently occurs on China’s Z City Metro Line 1. After on-site investigation and analysis by the metro operating company, it was speculated that related to abnormal track irregularities. Therefore, taking 1 as main research object, measured irregularity whole line analyzed compared with other typical spectra, a track-vehicle-pantograph-catenary coupling dynamics model established analyze relationship between pantograph-catenary dynamic...