Modelling of ground-borne vibration when the train speed approaches the critical speed

J. Y. Shih, David J. Thompson, A. Zervos

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

141 Downloads (Pure)

Abstract

When trains run on soft ground, large deflections of the track and vibration of the ground can occur when the train speed approaches the speed of Rayleigh waves in the ground. Modelling is helpful to understand and mitigate such critical velocity effects. Here, a three-dimensional time-domain model of a load moving on a track and ground has been developed with the finite element software ABAQUS. This allows nonlinear soil properties to be considered. In order to validate the approach, the vibration of the track and ground induced by a high speed train is compared with those from the site measurements carried out in the late 1990s at Ledsgård, Sweden. Due to the particularly soft soil at this site, it is necessary to adopt a nonlinear soil model due to the large deflections induced by the high-speed train. It is shown that using a linear model based on the small strain soil parameters leads to results which underestimate the displacements. Laboratory test data allow the nonlinear characteristics to be obtained. These have previously been used by various authors in an equivalent linear model. Here this approach is compared with a fully nonlinear model.

Original languageEnglish
Title of host publicationNoise and Vibration Mitigation for Rail Transportation Systems
Subtitle of host publicationProceedings of the 12th International Workshop on Railway Noise, 12-16 September 2016, Terrigal, Australia
PublisherSpringer Verlag
Pages497-508
Number of pages12
ISBN (Electronic)978-3-319-73411-8
ISBN (Print)978-3-319-73410-1
DOIs
Publication statusPublished - 20 May 2018
Event12th International Workshop on Railway Noise - Terrigal, Australia
Duration: 12 Sep 201616 Sep 2016

Publication series

NameNotes on Numerical Fluid Mechanics and Multidisciplinary Design
Volume139
ISSN (Print)1612-2909

Conference

Conference12th International Workshop on Railway Noise
Country/TerritoryAustralia
CityTerrigal
Period12/09/1616/09/16

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Fingerprint

Dive into the research topics of 'Modelling of ground-borne vibration when the train speed approaches the critical speed'. Together they form a unique fingerprint.

Cite this