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
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- EP ID EP759814
- DOI 10.16037/j.1007-869x.2025.02.017
- Views 3
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