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Research on an Identification Method for Wheelset Coaxial Wheel Diameter Difference Based on Trackside Wheelset
Xinyu Peng1, Jing Zeng1, Qunsheng Wang1
1Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China.
Sensors (Basel, Switzerland)
|July 14, 2023
Summary
Online monitoring of wheelset coaxial wheel diameter difference in freight cars is crucial for safety. Detecting wheelset lateral displacement using a trackside system can accurately identify this fault, improving railway vehicle stability and comfort.
Area of Science:
- Railway Engineering
- Vehicle Dynamics
- Condition Monitoring
Background:
- Wheelset coaxial wheel diameter difference is a common railway vehicle fault.
- This fault can degrade vehicle stability, comfort, and safety, increasing derailment risk.
- Online monitoring is needed to detect this fault in freight cars.
Purpose of the Study:
- To develop an online monitoring method for wheelset coaxial wheel diameter difference.
- To analyze the relationship between wheelset coaxial wheel diameter difference and rail lateral displacement.
- To establish a precise method for identifying wheelset coaxial wheel diameter difference using trackside detection.
Main Methods:
- Established a vehicle-track coupling dynamics model.
- Analyzed rail lateral displacement response to wheelset coaxial wheel diameter difference.
- Investigated the influence of vehicle speed and unbalance loading.
- Developed a mapping relationship between wheelset coaxial wheel diameter difference and wheelset lateral displacement.
- Verified the method with a trackside monitoring system test.
Main Results:
- Wheelset coaxial wheel diameter difference causes vehicle run deviation and increases wheelset lateral offset.
- Lateral displacement detection effectively reflects the presence of wheelset coaxial wheel diameter difference.
- Lateral displacement shows a quadratic growth with the diameter difference on straight lines, independent of speed.
- Vehicle unbalance loading has a minor impact compared to diameter difference.
Conclusions:
- Trackside detection of wheelset lateral displacement can accurately identify wheelset coaxial wheel diameter difference.
- The established mapping relationship enables precise online monitoring of this fault.
- This method enhances the safety and operational stability of railway vehicles.
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