Structural Design of Obstacle Deflector on Type-A City Rail Transit Train
Journal Title: Urban Mass Transit - Year 2025, Vol 28, Issue 2
Abstract
［Objective］ European standard EN 15227:2020 stipulates that except the obstacle-clearing capabilities, OD (obstacle deflector) should also have energy absorption functions, specifying the energy absorption values required for trains at different speed levels. Based on this requirement, it is necessary to study the structural design of the OD for type-A city rail transit trains. ［Method］ In line with the requirements of the actual city rail transit train project in a Chinese city, the structural design scheme for a type-A city rail transit train OD with 140 km/h design speed is proposed. The main components of this OD, including the structures of obstacle-clearing unit, energy-absorbing unit, and anti-trip mechanism are designed. Static strength and dynamic energy absorption simulation analysis calculations are conducted based on the static load and dynamic overload requirements outlined in the standard EN 15227:2020. The simulation calculation results are compared with the performance requirements specified by the standard to evaluate the feasibility of the OD structural design schemes. ［Result & Conclusion］ The maximum stress of the OD under two static load conditions is below the yield strength of the crash component materials as specified by the standard. During the dynamic energy absorption process, the aluminum honeycomb demonstrates stable buffer force with no component failures of the OD. The total energy absorption meets the standard requirements, indicating that the selection of the energy absorption unit is appropriate. Therefore, the structural design of this OD is considered reasonable, with strong obstacle-clearing capabilities and excellent buffering and energy absorption characteristics, meeting the operational requirements of type-A city rail transit trains.
Authors and Affiliations
Pengfei DUAN, Peng ZHANG, Yang WU, Shuai LI
Keywords
Related Articles
- EP ID EP759814
- DOI 10.16037/j.1007-869x.2025.02.017
- Views 28
- Downloads 0
Application of Impulse Response Characteristics in Rail-ground Transition Resistance Measurement
Objective The stray current harm in urban rail transit lines is increasingly non-ignorable. Stray current is not easy to be detected, and the amount of the rail-ground transition resistance is a crucial factor affecting...
Research on the Application of E-CNY Boarding Code in Urban Rail Transit
［Objective］ As in China E-CNY (hereinafter referred to as "digital currency") flourishes in all walks of life, the application scenarios of digital currency in urban rail transit are gradually enriched. Traditionally,...
Research on Far-field Eddy Current Testing Method for Riveting Clearance Classification of Metro Vehicle Casting Component
Objective Riveting quality issues cannot be visually judged. By employing the far-field eddy current testing method, internal quality defects in riveted structural components can be detected, providing theoretical and te...
Simulation Study on the 3D Layout and Optimization Method of Metro Station Entrances/Exits Considering Rainfall Factors
［Objective］ The rational layout of metro station entrances and exits plays a crucial role in enhancing the efficiency of urban rail transit systems. To address the limitations of conventional 2D evaluation methods, due...
QoS Strategies for Wired Communication Networks in Urban Rail Transit Signaling System
Objective With the increase in data traffic and diversification of data types in urban rail transit signaling systems, higher demands are placed on reliability, real-time performance, and security. It is necessary to tho...