1 Introduction
2 Modelling of vehicle–track–tunnel dynamic interaction
2.1 Dynamic equations of motion for the VTT interaction systems
2.2 Modelling of the tunnel system
2.2.1 Finite elemental matrix for tunnel segments
2.2.2 Interaction matrices between tunnel segments
2.3 Modelling of the soil around the tunnel
3 Solution for the VTT dynamic interaction
3.1 Improved cyclic calculation method for VTT dynamic solutions
3.2 Modeling framework for the VTT dynamic interaction
4 Numerical study
4.1 Model validation
4.1.1 Validation of the cyclic calculation solution
4.1.2 Comparisons with the wheel-rail elastic contact solution
4.2 Influence of segment element number on VTT system performance
4.3 Influence of the tunnel configuration on vehicle–track interaction
Joint stiffness coefficients | Value (N/m) |
---|---|
Longitudinal | 1.5 × 108 |
Lateral | 1 × 109 |
Vertical | 1 × 108 |