Work

Dynamic response of high-speed railway vehicle and welded turnout on large-span bridges based on rigid-flexible coupling system

Year: 2024

Type: article

Abstract: Welded Turnout on Large-span Bridge (WTLB) is a complex multi-layer heterogeneous system and can significantly influence the service performance of High-Speed Railway (HSR). Understanding the coupling dynamic response of the vehicle and WTLB is essential. Previous research did not consider the dynamic behavior of foundations, leading to an underestimation of the vehicle-turnout-foundation coupling dynamic response, particularly when turnouts were laid on large-span bridges. This study proposes a novel modeling method that includes the foundations, to overcome the previous shortcomings by applying a rigid-flexible coupling system. In this approach, the vehicle was modeled as a rigid body sub-model in a Multi-Body Software (MBS), while WTLB was modeled as a flexible bodies sub-model using Finite Element (FE) software. The modal information from the FE model was imported into the MBS software. The two sub-models were coupled by the wheel-rail contact in the MBS environment and then the Vehicle-turnout-bridge Rigid-flexible Coupling Dynamic (VRCD) calculation model was established and it was discovered that the calculation results showed good agreement with the field test data. Through the VRCD model, the safety of the structure, the stability of the vehicle and the comfort of passengers were investigated, as well as several important infrastructure factors. The results demonstrate that this novel method provides accurate calculations and highlights the complex and significant interactions in the vehicle-turnout-bridge system. • Propose a VRCD model based on rigid flexible coupling dynamics system for convenient modeling and accurate calculation. • The maximum wheel-rail force and axle transverse force occur at the frog, existing structural irregularity at the frog. • The increase of the stiffness of the beam can effectively reduce the dynamic response of the beam and the carbody. • The beam initial deflection caused by the adjacent line makes the carbody vertical acceleration increase significantly.

Source: High-speed Railway

DOI: 10.1016/j.hspr.2024.09.001

Authors: Xiaopei Cai, Zijie Zhong, Albert Lau, Qian Zhang, Yue Hou

Institutions: Beijing Jiaotong University, Norwegian University of Science and Technology, Swansea University

Language: English

Topic: Railway Engineering and Dynamics

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: diamond

Funder: National Natural Science Foundation of China