列车通过平地至路堑挡风墙过渡区域的动态行为及缓解措施

Translated title of the contribution: Dynamic behaviors and mitigation measures of a train passing through windbreak transitions from ground to cutting

Zheng wei Chen, Tang hong Liu, Zi jian Guo, Xiao shuai Huo, Wen hui Li, Yu tao Xia

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

In this paper, the effects of a right-angle windbreak transition (RWT) from the flat ground to cutting on train aerodynamic and dynamic responses were investigated, then a mitigation measure, an oblique structure transition (OST) was proposed to reduce the impact of RWT on the train aerodynamic and dynamic performance. The results showed that in the RWT region, the airflow was divided into two parts. One part of the airflow induced a strong backflow in the flat ground position, and the other part of the airflow induced a strong backflow in the cutting position. Therefore, there were two lateral impacts on the train. For the head car with the OST, the drop ratios of the peak-to-peak values compared with RWT were 47%, 40%, and 52% for the side force coefficient CFy, lift force coefficient CFz and overturning moment coefficient CMx, respectively. For the peak-to-peak value of the dynamic parameters, the drop ratios of OST compared with RWT were all larger than 50%. The maximum dynamic overturning coefficients for RWT and OST were 0.75 and 0.3, respectively.

Translated title of the contributionDynamic behaviors and mitigation measures of a train passing through windbreak transitions from ground to cutting
Original languageChinese (Simplified)
Pages (from-to)2675-2689
Number of pages15
JournalJournal of Central South University
Volume29
Issue number8
DOIs
Publication statusPublished - Aug 2022

Keywords

  • CFD
  • crosswind
  • high-speed train
  • train aerodynamics
  • vehicle system dynamics
  • windbreak wall

ASJC Scopus subject areas

  • General Engineering
  • Metals and Alloys

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