Rigorous vehicle soil track simulation of high speed rail through optimization based model order reduction

Nikolaos Lesgidis*, Anastasios Sextos, Lukas Moschen, Gutierrez G. Juan S., Elisabetta Pistone

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

This paper aims to develop a time domain analysis method capable of accurately simulating the vehiclesoil-track interaction phenomenon in a computationally rigorous manner. The proposed method takes full account of wave propagation effects in the subsoil half-space through the development of a systematic frequency dependent lumped parameter assembly. A robust multi-objective optimization methodology is proposed for the calibration of the developed lumped parameter assembly targeting the dynamic behavior, global stability and passivity of the track-subsoil system while maintaining the broad applicability of the method by any commercial FEM software. A case study of a ballasted track on a soft clay profile is presented in order to investigate the efficiency of the proposed methodology. Finally, the monitored response of a modern ballastless high speed track located in mainland Europe is used for further verification. Results demonstrate the efficiency, accuracy and applicability of the proposed methodology
Original languageEnglish
Article number100350
Number of pages13
JournalTransportation Geotechnics
Volume23
Early online date6 Mar 2020
DOIs
Publication statusPublished - Jun 2020

Keywords

  • Track dynamics
  • Track–soil interaction
  • Vehicle–track interaction measurement
  • Ground vibration
  • Railway vibration

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