Probabilistic model and analysis of coupled train-ballasted track-subgrade system with uncertain structural parameters

作     者：MAO Jian-feng XIAO Yuan-jie YU Zhi-wu Erol TUTUMLUER ZHU Zhi-hui 毛建锋;肖源杰;余志武;Erol TUTUMLUER;朱志辉

作者机构：School of Civil EngineeringCentral South UniversityChangsha 410075China National Engineering Laboratory for High-Speed Railway ConstructionChangsha 410075China Key Laboratory of Engineering Structures of Heavy Haul Railway of Ministry of EducationCentral South UniversityChangsha 410075China Department of Civil and Environmental EngineeringUniversity of Illinois at Urbana-ChampaignUrbanaIL 61801United States 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2021年第28卷第7期

页      面：2238-2256页

核心收录：

学科分类：082304[工学-载运工具运用工程] 08[工学] 080204[工学-车辆工程] 0802[工学-机械工程] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：Projects(51708558,51878673,U1734208,52078485,U1934217,U1934209)supported by the National Natural Science Foundation of China Project(2020JJ5740)supported by the Natural Science Foundation of Hunan Province,China Project(KF2020-03)supported by the Key Open Fund of State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,China Project(2020-Special-02)supported by the Science and Technology Research and Development Program of China Railway Group Limited 

主　　题：coupled train-ballast-subgrade system structural parameter uncertainty stochastic dynamic analysis probability density evolution method wheel-rail interaction 

摘      要：Random dynamic responses caused by the uncertainty of structural parameters of the coupled train-ballasted track-subgrade system under train loading can pose safety concerns to the train *** paper introduced a computational model for analyzing probabilistic dynamic responses of three-dimensional(3D)coupled train-ballasted track-subgrade system(TBTSS),where the coupling effects of uncertain rail irregularities,stiffness and damping properties of ballast and subgrade layers were simultaneously *** number theoretical method(NTM)was employed to design discrete points for the multi-dimensional stochastic *** time-histories of stochastic dynamic vibrations of the TBSS with systematically uncertain structural parameters were calculated accurately and efficiently by employing the probability density evolution method(PDEM).The model-predicted results were consistent with those by the Monte Carlo simulation method.A sensitivity study was performed to assess the relative importance of those uncertain structural parameters,based on which a case study was presented to explore the stochastic probability evolution mechanism of such train-ballasted track-subgrade system.