Dynamic responses of a high-speed train passing a deformed bridge using a vehicle-track-bridge coupled model

Hongye Gou, Chang Liu, Wen Zhou, Yi Bao, Qianhui Pu

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

With the development of the railway network in a harsh environment, the additional bridge deformations accumulated over time may endanger high-speed trains passing through a bridge, since the bridge deformation directly affect the geometry of the track on the bridge, thus affecting the dynamic responses of the train. This paper investigates the effects of different types of bridge deformation on the dynamic responses of the high-speed train passing through a deformed bridge. First, a finite element model is established for a high-speed railway bridge to study the dynamic responses of vehicle-track-bridge system under bridge deformations. Then, the rail deformation caused by bridge deformation is calculated using a bridge-track deformation mapping model, and used as the excitation to the vehicle-track-bridge system to study the influence of bridge deformations on the dynamic responses of the train. Results show that the vertical bridge deformations mainly affect the vertical vehicle dynamic indices, and have negligible effect on the lateral dynamic indices. The additional bridge deformation generates an additional low-frequency excitation to the train. The bridge deformations mainly affect the dynamic responses at specific characteristic frequencies, which are independent on the magnitude of the deformation. The frequencies for bridge deformations are magnified at about 1 Hz, indicating that the additional bridge deformation may aggravate the vertical vibration of the train.

Original languageEnglish
Pages (from-to)463-477
Number of pages15
JournalProceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
Volume235
Issue number4
DOIs
StatePublished - Apr 2021

Keywords

  • Additional bridge deformation
  • deformation mapping
  • dynamic response
  • high-speed railway
  • vehicle-track-bridge vibration

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