风屏障对桥梁及车桥系统气动特性影响的数值研究

Translated title of the contribution: Numerical study of effect of wind barrier on aerodynamic of bridge and train-bridge system

Lei Zhou, Xuhui He, Zhengwei Chen, Taizhong Xie, Haiquan Jing

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

The numerical simulation method was used to study the effects of wind barrier parameters(porosity rate and height) on aerodynamic characteristics of streamlined bridges. The influence of wind barriers on aerodynamic characteristics of different bridge types was systematically analyzed and compared laterally, and in addition, the influence of wind barriers on aerodynamic characteristics of train-bridge system and its flow field were discussed, the potential mechanism of wind barrier on the aerodynamic performance train-bridge system was revealed by analysing the characteristics of three-component force coefficient, pressure contour, velocity flow field, wind pressure distribution and wind profile. The results show that the wind barrier can reduce drag force and lift moment on the train, but also significantly increase the drag force of the girder since it declines the average flow velocity above the main beam.Therefore, the installation of wind barriers can improve the driving safety of the train but can be harmful for the wind resistance of the bridge. The optimal combination of wind barrier for streamlined bridge-deck section is 3 m with porosity rate of 30% since the drag force coefficient reaches the minimum value 1.33 in this case. The sheltering effect of wind barrier is different for different girder types, normally, the sheltering effect of the same wind barrier on streamlined bridge-deck section is much larger than that of bluff bridge-deck section.

Translated title of the contributionNumerical study of effect of wind barrier on aerodynamic of bridge and train-bridge system
Original languageChinese (Simplified)
Pages (from-to)1742-1752
Number of pages11
JournalZhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology)
Volume49
Issue number7
DOIs
Publication statusPublished - 26 Jul 2018
Externally publishedYes

Keywords

  • Crosswind
  • Porosity rate
  • Train-bridge system
  • Wind barrier

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Geotechnical Engineering and Engineering Geology
  • Metals and Alloys
  • Materials Chemistry

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