Study on Anti-overturning Characteristics of 60R2 Groove Rail and CHN60 Rail for Fastener Type Ballastless Track of Tram
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 6
Abstract
Objective In order to provide theoretical support for the selection and design of the tram rail and fasteners in different sections, it is necessary to study the anti-overturning characteristics of the 60R2 groove rail and the CHN60 rail for the fastener type ballastless track, and analyze the influencing factors of their anti-overturning performance. Method The finite element method is used to establish a simplified analysis model for 60R2 groove rail and CHN60 rail. The effects of the vertical stiffness of different rail pads, lateral stiffness of fasteners, spacing between fasteners, and 2 mm and 5 mm looseness of fastener clips on the lateral displacement of rails, the vertical displacement of fastener clips, the lateral force borne by fasteners, and the contact length between rails and pads are analyzed. Result & Conclusion The simulation study shows that the torsional stiffness of CHN60 rail is about 173 times that of 60R2 groove rail, and the vertical force eccentricity of CHN60 rail is greater than that of the 60R2 groove rail. Under the same working conditions, the lateral displacement of 60R2 groove rail and the vertical displacement of its fastener clip are larger than those of CHN60 rail, but the fasteners of 60R2 groove rail bear less lateral force than those of CHN60. The smaller the stiffness of the rail pad, the larger the spacing between fasteners, and the greater the lateral displacement of the rail and the vertical displacement of the outer fastener clips. In areas with small radius and large lateral forces, the stiffness of the rail pad should be appropriately improved, the spacing between fasteners be increased, and the amplitude of the fastener clip in fatigue test be appropriately enlarged. The main influencing factors of the lateral force that the fasteners bear include rail type, lateral stiffness, and spacing between fasteners, while the stiffness of the rail pad has a relatively small effect on fasteners. Under the present calculation conditions, the rail lateral displacement changes relatively small with the fastener clip looseness of 2 mm and 5 mm. The embedded tram track with small radius section which is difficult to inspect should be excavated and inspected regularly, and the bolts should be tightened to maintain the specified seam value of the fastener clips.
Authors and Affiliations
Yipeng CUI, Caixia MIAO
Keywords
Related Articles
- EP ID EP737736
- DOI 10.16037/j.1007-869x.2024.06.007
- Views 24
- Downloads 0
Research on the Power Supply Scheme for LTE Remote Equipment on Urban Rapid Transit Lines Based on DC Remote Power Supply Technology
Objective With regard to the equipment power supply demand for long-distance section of urban rapid transit lines, the traditional point-to-point and cross-redundant power supply method for remote equipment in urban rail...
Equipment Optimization Scheme for High Failure Rate Auxiliary Converter of Metro Train in High Temperature and High Humidity Environment
Objective Over high humidity in the operating environment of metro train auxiliary power supply system will lead to high leakage current of IGBT (insulated gate bipolar transistor), which may further cause the auxiliary...
Performance Analysis and Application Prospects of New Silicon-Carbon Anode Materials in Rail Transit Vehicle Soft-pack Batteries
［Objective］ The large-scale application of silicon-containing anode materials in soft-pack battery for urban rail transit vehicles faces many challenges, primarily the failure of electrical performance due to the volum...
Study on Fatigue Life Reliability of Vehicle Bogie Arm Positioning Node
Objective Based on the virtual simulation fatigue test technology, fatigue life analysis and reliability evaluation of the bogie arm positioning node of a certain type of vehicle are carried out to improve the vehicle st...
Calculation Model of Safety Distance between Shield Tunnels and Underground Cavities in Water-Rich Sandy Cobble Stratum
［Objective］ In order to ensure the shield tunnel construction safety in water-rich sandy cobble stratum when passing through underground cavities, it is necessary to study the safe distance between the shield tunnels a...