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Modelling and Analysis of Expansion Joints' Effect on Dynamic Performance of Railway Rigid Overhead System.
Xiaohe Feng1, Zeyao Hu1, Shibin Gao1
1National Rail Transit Electrification and Automation Engineering Technique Research Centre, Southwest Jiaotong University, Chengdu 610031, China.
Sensors (Basel, Switzerland)
|August 12, 2023
Summary
This study models rigid overhead systems, finding expansion joints safe but with stress concentrations. Optimizing design and reducing mass can improve performance and current collection quality.
Area of Science:
- Mechanical Engineering
- Civil Engineering
- Electrical Engineering
Background:
- Rigid overhead systems are critical infrastructure.
- Accurate modeling is essential for safety and performance.
- Expansion joints are key components requiring detailed analysis.
Purpose of the Study:
- To develop a comprehensive finite element model of a rigid overhead system.
- To analyze the dynamic behavior and stress distribution of the expansion joint.
- To identify areas for performance improvement in the overhead system.
Main Methods:
- Finite element theory and beam elements used for system modeling.
- Evaluation of dynamic characteristics for suspension structures and clamps.
- Analysis of expansion joint under various assembly and temperature conditions.
Main Results:
- Maximum stresses in the expansion joint remain within material limits, indicating safety.
- Stress concentration identified at sliding block B and sliding rod A.
- Expansion joint mass significantly impacts pantograph-overhead system current collection quality.
Conclusions:
- The current design of the rigid overhead system's expansion joint is safe.
- Optimization of installation deflection angle and geometric design can improve stress distribution.
- Reducing the expansion joint's mass is recommended to enhance current collection quality.
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