Safety of trains moving on embankments due to foundation settlement

  • 鄭 吉閔

Student thesis: Master's Thesis


The purpose of this article attempts to evaluate the safety when high speed trains moving on embankments due to foundation settlement In order to propose some useful suggestions for improvements in safety this research involves both simulation and experiment analysis Models for a high speed train and an embankment with foundation settlement were established The train model consisted of wheel element spring damper and lump mass in a finite element analysis and the rigid link effect between mass centers was also considered The Newmark method was applied for direct integration analysis to obtain response solutions Derailment coefficient was used to provide a useful reference to evaluate the derailment behavior of trains A vibration experiment was conducted on a moving train of Taiwan High Speed Train (THSR) One-third octave band was performed for calculating dB values of vibrations measured on THSR moving trains The data show that dB values obtained from embankments are higher than others in the different structural types along the THSR track which indicates that track irregularity on embankments is more obvious and worthy of notice Decreasing the speed of trains is a useful approach to make sure that the train would not derail The derailment behavior of wheels often occur under the first and the last carriage of moving trains Smoother rail track can decrease the derailment coefficient make the train safer
Date of Award2014 Aug 1
Original languageEnglish
SupervisorShen-Haw Ju (Supervisor)

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