A framework for dynamic modelling of railway track switches considering the switch blades,actuators and control systems  

作　　者：Saikat Dutta Tim Harrison Christopher Ward Roger Dixon Phil Winship 

机构地区：[1]Institute of Thermofluids,School of Mechanical Engineering,University of Leeds,Leeds,West Yorkshire,UK [2]Wolfson School of Mechanical,Electrical and Manufacturing Engineering,Loughborough University,Loughborough,Leicestershire,UK [3]Birmingham Centre for Railway Research and Education,School of Engineering,University of Birmingham,Birmingham,West Midlands,UK [4]Network Rail,Milton Keynes,Buckinghamshire,UK

出　　处：《Railway Engineering Science》2024年第2期162-176,共15页铁道工程科学（英文版）

基　　金：This research was supported by the European Union’s‘Shift2Rail’through No.826255 for the project IN2TRACK2:Research into enhanced track and switch and crossing system 2

摘　　要：The main contribution of this paper is the development and demonstration of a novel methodology that can be followed to develop a simulation twin of a railway track switch system to test the functionality in a digital environment.This is important because,globally,railway track switches are used to allow trains to change routes;they are a key part of all railway networks.However,because track switches are single points of failure and safety-critical,their inability to operate correctly can cause significant delays and concomitant costs.In order to better understand the dynamic behaviour of switches during operation,this paper has developed a full simulation twin of a complete track switch system.The approach fuses finite element for the rail bending and motion,with physics-based models of the electromechanical actuator system and the control system.Hence,it provides researchers and engineers the opportunity to explore and understand the design space around the dynamic operation of new switches and switch machines before they are built.This is useful for looking at the modification or monitoring of existing switches,and it becomes even more important when new switch concepts are being considered and evaluated.The simulation is capable of running in real time or faster meaning designs can be iterated and checked interactively.The paper describes the modelling approach,demonstrates the methodology by developing the system model for a novel“REPOINT”switch system,and evaluates the system level performance against the dynamic performance requirements for the switch.In the context of that case study,it is found that the proposed new actuation system as designed can meet(and exceed)the system performance requirements,and that the fault tolerance built into the actuation ensures continued operation after a single actuator failure.

关 键 词：Railway track switch Mathematical modelling Redundant actuation Finite element analysis 

分 类 号：U213.6[交通运输工程—道路与铁道工程]