Modelling options for ballast track dynamics

Jou-Yi Shih, Dimitrios Kostovasilis, Yann Bezin, D.J. Thompson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Accurate modelling of railway ballasted track dynamics is an important issue for a variety of applications such as the assessment of wheel/rail contact force and critical speed of the vehicle. Track design and assessment against safety and stability criteria can now rely on a number of advanced and validated dynamic models. However, there is a large range of different models that can be used to predict ballasted track dynamics. They vary from fast and simple rigid multi-body models as used in commercial Multibody System approach (MBS) vehicle dynamics calculations, to more complex and expensive three-dimensional (3D) Finite Element (FE) models. This paper investigates the influence of different modelling options up to 2000 Hz for characterising ballasted track 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 sleeper flexibility, and a 3D FE track model with homogeneous ballast layer are used to represent the 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.
Original languageEnglish
Title of host publicationProceedings of the 24th International Congress on Sound and Vibration
Subtitle of host publicationLondon Calling, 2017
EditorsBarry Gibbs
PublisherInternational Institute of Acoustics and Vibrations
Pages3746-3753
Number of pages8
ISBN (Electronic)9781906913274
Publication statusPublished - 2017
Event24th International Congress on Sound and Vibration - Park Plaza Westminster Bridge Hotel, London, United Kingdom
Duration: 23 Jul 201727 Jul 2017
Conference number: 24
http://www.icsv24.org/ (Link to Congress Website)

Conference

Conference24th International Congress on Sound and Vibration
Abbreviated titleICSV24
CountryUnited Kingdom
CityLondon
Period23/07/1727/07/17
Internet address

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