On dynamic analysis method for large-scale train-track-substructure interaction

作     者：Lei Xu Lei Xu

作者机构：School of Civil EngineeringCentral South UniversityChangsha 410075China National Engineering Laboratory for High-Speed Railway ConstructionChangsha 410075China 

出 版 物：《Railway Engineering Science》 (铁道工程科学（英文版）)

年 卷 期：2022年第30卷第2期

页      面：162-182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：This work was supported by the National Natural Science Foundation of China(Grant No.52008404) the National Natural Science Foundation of Hunan Province(Grant No.2021JJ30850) 

主　　题：Train Track dynamic interaction Railway substructures Finite elements Dynamics system Iterative solution Tunnel Bridge 

摘      要：Train–track–substructure dynamic interaction is an extension of the vehicle–track coupled *** contributes to evaluate dynamic interaction and performance between train–track system and its *** the first time,this work devotes to presenting engineering practical methods for modeling and solving such large-scale train–track–substructure interaction systems from a unified *** this study,a train consists of several multi-rigid-body vehicles,and the track is modeled by various finite *** track length needs only satisfy the length of a train plus boundary length at two sides,despite how long the train moves on the *** substructures and their interaction matrices to the upper track are established as independent modules,with no need for additionally building the track structures above substructures,and accordingly saving computational ***–substructure local coordinates are defined to assist the confirming of the overlapped portions between the train–track system and the substructural system to effectively combine the cyclic calculation and iterative solution *** advancement of this model lies in its convenience,efficiency and accuracy in continuously considering the vibration participation of multi-types of substructures against the moving of a train on the *** examples have shown the effectiveness of this method;besides,influence of substructures on train–track dynamic behaviors is illustrated accompanied by clarifying excitation difference of different track irregularity spectrums.