Analysis of Vehicle-Track Coupled Dynamics Model of Slab Ballastless Track Considering Cohesion Model

DOI

10.2991/978-94-6463-449-5_20How to use a DOI?

Keywords

Slab ballastless track; CA mortar; Debonding; Cohesive force element; Dynamic response

Abstract

The debonding between CA mortar and track slabs has become a typical disease of ballastless tracks for high-speed railways. The interaction of track slab and CA mortar interface is relatively complex, and accurately simulating the bonding relationship between the two is very meaningful for the numerical analysis and damage detection of slab ballastless tracks. This article takes a typical vehicle and the ballastless track slab of CRTSII type as engineering backgrounds. By inserting cohesive elements into the interface of CA mortar and track slab to simulate their bonding effect, a numerical model of the vehicle and track is established by using finite element software. The vibration responses of the track and rails under vehicle load are obtained through coupled dynamic analysis, and the responses of typical measurement points from the track are selected as the verification parameter. It was verified that the model is reasonable by comparing its responses with existing relevant literature values. The research results indicate that the track displacement and acceleration vibration response obtained based on the established model meet the limit values and are close to the values in relevant literature. The slab ballastless track vehicle rail coupling dynamic model considering the cohesive force model can be used as the benchmark model for vehicle-track coupling dynamic analysis.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Zhicheng Liang
AU  - Kun Zhang
AU  - Xinran Li
PY  - 2024
DA  - 2024/06/30
TI  - Analysis of Vehicle-Track Coupled Dynamics Model of Slab Ballastless Track Considering Cohesion Model
BT  - Proceedings of the 2024 8th International Conference on Civil Architecture and Structural Engineering (ICCASE 2024)
PB  - Atlantis Press
SP  - 199
EP  - 209
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-449-5_20
DO  - 10.2991/978-94-6463-449-5_20
ID  - Liang2024
ER  -