Large eddy simulation of unsteady aerodynamic behavior of long-span vaulted roofs

Wei Ding, Yasushi Uematsu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper discusses the unsteady aerodynamic behavior of long-span vaulted roofs. First, a forced vibration test in a turbulent boundary layer is conducted in a wind tunnel. The models are force vibrated in the first anti-symmetric mode to investigate the effects of wind speed, rise/span ratio, and the amplitude and frequency of forced vibration on the distributions of wind pressures and unsteady aerodynamic forces. Then, a large eddy simulation (LES) is carried out to clarify the physical mechanism of wind-roof interaction as well as to investigate the influences of a roof’s vibration on the flow field around the roof. From the results of the wind tunnel experiment and the LES, we discuss the characteristics of unsteady aerodynamic forces on a long-span vaulted roof over a wide range of the reduced frequency of vibration. The effect of unsteady aerodynamic forces on the dynamic response of the roof is also discussed. A comparison between the wind tunnel experiment and the LES indicates that the LES can be used effectively to evaluate the unsteady aerodynamic behavior.

Original languageEnglish
Pages (from-to)793-806
Number of pages14
JournalJournal of Zhejiang University: Science A
Volume18
Issue number10
DOIs
Publication statusPublished - 2017 Oct 1

Keywords

  • Forced vibration test
  • Large eddy simulation (LES)
  • Long-span vaulted roof
  • Unsteady aerodynamic behavior
  • Wind tunnel experiment

ASJC Scopus subject areas

  • Engineering(all)

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