Vehicle–track–tunnel dynamic interaction: a finite/infinite element modelling method

Abstract The aim of this study is to develop coupled matrix formulations characterize the dynamic interaction between vehicle, track, and tunnel. vehicle–track system established in light dynamics theory. physical characteristics mechanical behavior tunnel segments rings are modeled by finite element method, while soil layers vehicle–track–tunnel (VTT) as an assemblage 3-D mapping infinite elements satisfying boundary conditions at area. With novelty, components, such segments, have been systems using a coupling method for elements. responses sub-systems included VTT obtained simultaneously guarantee solution accuracy. To relieve computer storage save CPU time large-scale with high degrees freedoms, cyclic calculation introduced. Apart from model validations, necessity considering substructures demonstrated. In addition, maximum number segment confirmed numerical simulations.