A5023463321- Electrical Contact Performance and Analysis
- Mechanical stress and fatigue analysis
- Adhesion, Friction, and Surface Interactions
- Metal Alloys Wear and Properties
- Fatigue and fracture mechanics
- Railway Engineering and Dynamics
- Structural Health Monitoring Techniques
- High Entropy Alloys Studies
- Additive Manufacturing Materials and Processes
- Gear and Bearing Dynamics Analysis
- Structural Response to Dynamic Loads
- Numerical methods in engineering
- Engineering Applied Research
- Lubricants and Their Additives
- Structural Load-Bearing Analysis
- Structural Engineering and Vibration Analysis
- Brake Systems and Friction Analysis
- Structural Behavior of Reinforced Concrete
- Semiconductor materials and interfaces
- Topology Optimization in Engineering
East China Jiaotong University
2019-2025
Heavy rolling contact fatigue (RCF) may be caused by wheel surface defects under the influence of rail corrosion, which threatens operational safety vehicles. To investigate role on RCF damage a salt spray tester was used to corrode rails, an impact testing machine employed create defects, and tests were completed. The studied monitoring defect cross-section. results indicate that tendencies crack extension different sizes are similar, they all extend in C-shape along tangential force...
In this paper, Fe-based and Co-based alloy powders were chosen to perform laser cladding on wheel materials through conventional (CLC) ultra-high-speed (UHSLC) processes, respectively. The microstructures, element distribution, phase composition hardness of the coating layers using CLC UHSLC processes compared analysed. results show that coatings dense free defects such as pores cracks. Compared with coating, grain size was smaller, close powder design composition, distribution Cr within...
To further investigate the influence of temperature and copper content on carbon brush current-carrying friction brush/friction disc contact pair. In this paper, wear performance five brushes with different contents at two types temperatures was discussed. The tests were carried out a pin-disc type tester heating system. results show there is critical that affects by influencing integrity film. As test increases, rate samples in high group increases dramatically.
During the operation of subway vehicles, vibration air conditioning units is mainly transmitted to vehicle body through suspension support, which seriously affects stability and comfort during operation. Therefore, design optimization support has become a hot topic in research dynamic characteristics vehicles. In this paper, rigid flexible coupling model metro firstly calculated simulate stress point when running. The initial structure carried out, taken as load input analyze stiffness...
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摘要: 为研究高速列车传动齿轮在啮合过程中因接触表面各啮合点处滑差不一致对动态接触特性的影响。以CRH3型动车组转向架传动齿轮为研究对象,基于齿轮接触相关理论及轮齿摩擦关系,引入考虑轮齿表面滑差、动力黏度及载荷等因素下的EHL时变摩擦模型,利用ABAQUS/Standard提供的隐式直接积分法对低速重载工况下的传动齿轮进行动态分析。通过对比无摩擦、常摩擦因数及变摩擦下的仿真结果分析齿轮间滑差及摩擦因数大小对齿轮副动态接触特性的影响。结果表明,表面啮合节点摩擦因数不一致对齿轮接触合力、接触斑面积、Mises、接触应力最大值及其分布影响很小;在啮合过程中,考虑滑差影响的齿面摩擦力波动更平缓,均值较常摩擦增加了40%;摩擦剪应力分布比采用常摩擦得到的结果更贴合实际。而常摩擦因数数值的增加对应力分布影响不大,但会使得接触面应力值相应增加,加剧系统的周期性振动。