Slab track-bridge interaction subjected to a moving train

Slab track-bridge interaction subjected to a moving train: an improved matrix formulation and truncation method

Zhang, Qiang (Student TU Delft)
Zhang, X. (TU Delft Geo-engineering)
Xu, Lei (Central South University China)

2022

Modelling slab track-bridge interaction subject to a moving train usually involves solving complex high-dimensional matrix equations which is time-consuming. This research works to optimize the auto-assembling process in the slab track-bridge coupling matrices formulation and improve the computational efficiency by truncating the dynamic matrices used in time integral scheme. To achieve the above goals, the key issue is to appropriately couple the systems’ dynamic matrices in conditions where the elemental sizes of the track slab and the bridge are inconsistent in 3-D space. Besides, by firstly clarifying the degrees of freedom vector of the rail, the track slab and the bridge girder participated in each time step, dynamic matrices characterizing the train-slab track-bridge interaction are truncated with time to reduce the matrix size. This present study has demonstrated the solutions for above problems. Apart from model validations, some numerical examples are presented to show applicability of the proposed methods.

finite elements model
matrix truncation
moving train
numerical simulation
Railway engineering dynamics
slab track-bridge interaction

http://resolver.tudelft.nl/uuid:d171f61f-57a8-4ee7-9ce5-f76ba3c90f64

https://doi.org/10.1080/23248378.2022.2097134

2324-8378

International Journal of Rail Transportation

Institutional Repository

journal article

© 2022 Qiang Zhang, X. Zhang, Lei Xu