Year: 2024
Type: conference-paper
Abstract: Accurate modelling of railway ballasted track dynamics is an important issue for a variety of \napplications such as the assessment of wheel/rail contact force and critical speed of the vehicle. \nTrack design and assessment against safety and stability criteria can now rely on a number of \nadvanced and validated dynamic models. However, there is a large range of different models that \ncan be used to predict ballasted track dynamics. They vary from fast and simple rigid multi-body \nmodels as used in commercial Multibody System approach (MBS) vehicle dynamics calculations, \nto more complex and expensive three-dimensional (3D) Finite Element (FE) models. This paper \ninvestigatesthe influence of different modelling options up to 2000 Hz for characterising ballasted \ntrack dynamics with the aim of providing guidelines for simplifying the model and summarising the advantages and limitations of each option. Five different models, a two-degrees-of-freedom (2 dof) multi-body track model, 2D FE model, 3D FE models with/without consideration of \nsleeper flexibility, and a 3D FE track model with homogeneous ballast layer are used to represent \nthe ballasted track as a two-layer support and compared against an analytical solution. Consideration is given to the flexibility of the sleepers, inclusion of ballast density and geometry, element discretization level and FE model length. Equivalent parameters to convert input data from one model to another are summarized
DOI: 10.25144/24195
Authors: J-Y SHIH, D KOSTOVASILIS, Y BEZIN, DJ THOMPSON
Institution: University of Southampton
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2678173520