Search:
Computing and Library Services - delivering an inspiring information environment

Modelling scheme for railway vehicle/track/ground dynamic interaction in the time domain

Shih, Jou-Yi, Thompson, D.J. and Zervos, A. (2016) Modelling scheme for railway vehicle/track/ground dynamic interaction in the time domain. In: Proceeding of the 24th UK conference of the Association for Computational Mechanics in Engineering, 31st March-1st April 2016, Cardiff, Wales.

[img]
Preview
PDF
Download (329kB) | Preview

Abstract

Modelling of vehicle/track/ground dynamic interaction is an important issue for railway design. Better
understanding of how the moving dynamic loads are distributed through the track components to the ground can
be derived from these numerical results to improve the stability of the moving train and decrease the cost of the
maintenance. Nonlinear models of the ground may be required due to the large displacements induced by
heavier and/or high-speed trains. The aim of this research is to develop a general modelling approach for
predicting the dynamic behaviour for a variety of situations.
A three-dimensional vehicle/track/ground approach in the time domain is presented. The finite element method
is used to model the track/ground vibration. The equations of motion of a multi-body vehicle are implemented to
couple with the ground/track system. An alternative approach to the commonly used infinite elements is
proposed for modelling the far-field, based on the use of mass-proportional damping to suppress the reflections
from model edges. Improved results are shown and better efficiency can be found compared to the results from
models with infinite elements. Furthermore, two different geometries for the ground model, a hemispherical and
a cuboid one, are discussed. The issue of transients developed by the moving load is discussed and it is shown
that long models are required for load speeds close to the wavespeed in the ground to allow the results to
achieve steady state. Finally, the results are benchmarked against the results from a wavenumber FE/BE model.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
Schools: School of Computing and Engineering
Depositing User: Jou-Yi Shih
Date Deposited: 03 Nov 2016 14:25
Last Modified: 30 Nov 2016 15:27
URI: http://eprints.hud.ac.uk/id/eprint/29628

Downloads

Downloads per month over past year

Repository Staff Only: item control page

View Item View Item

University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©