GROUND VIBRATION INDUCED BY HIGH-SPEED RAILWAY OPERATION WITH GEOMETRIC IRREGULARITIES
CHEN Gongqi1，2，GAO Guangyun1，2，ZHAO Hong1，2
(1. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China；2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China)
Abstract：In order to precisely study the environmental vibration generated by high-speed train，based on the equilibrium equation of the trains，combined with the track bending equation，a simplified analytical expression for train dynamic load is derived considering geometric irregularities. Then，the deduced train dynamic load is input to analyze the influences of wavelength and amplitude on ground vibration by 2.5D finite element method(FEM). The results show that：the wheel-rail force and ground vibration acceleration enlarge with the increasing track irregularity amplitude considering the irregularity wavelength and train speed as constant values. The wheel-rail force and ground vibration acceleration decrease with the increasing track irregularity wavelength considering the irregularity amplitude and train speed as constant values.
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2013, Vol. 32 
