Study on Wheel-Rail Interaction of Moving Trains in Curved Railways

Abstract

High-Speed Rail (HSR) and Mass Rapid Transit (MRT) are used increasingly in the world In order to save driving time and increase efficiency they pursue higher running velocity However cases of train derailment have always occurred resulting in loss of personnel and property so the issue of derailment must be discussed The most prone to derailment is the part of the curved rail so it is the part of interest in the study of derailment There are many design parameters that affect the derailment of the rail such as the cant the friction coefficient and the velocity and their relationship with each other is also an important point to discuss derailment In this thesis a finite element method (FEM) is used to develop the rail model which contains clothoid curve segments The parameters of the design rail refer to the specifications of the Ministry of Transportation and Communication R O C (MOTC) and the rail is designed as MRT rails and HSR rails In this thesis different trains are designed to travel on MRT rails and HSR rails and the effect of different cant and friction coefficient on derailment is observed by changing the running velocity of trains The derailment is divided into sliding and overturning to discuss The FEM model is used to simulate the critical radius value that will derail and the simulation results of FEM are compared with the ideal theoretical formula to verify whether the results of FEM are accurate The results show that the difference between the simulation results and the theoretical formula is very small so the rail model can be used in other cases with curved rails

Date of Award	2020
Original language	English
Supervisor	Shen-Haw Ju (Supervisor)