Flutter performance of central-slotted plate at large angles of attack

Haojun Tang, Yongle Li, Xinzhong Chen, K. M. Shum, Haili Liao

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The flutter instability is one of the most important themes need to be carefully investigated in the design of long-span bridges. This study takes the central-slotted ideal thin flat plate as an object, and examines the characteristics of unsteady surface pressures of stationary and vibrating cross sections based on computational fluid dynamics (CFD) simulations. The flutter derivatives are extracted from the surface pressure distribution and the critical flutter wind speed of a long span suspension bridge is then calculated. The influences of angle of attack and the slot ratio on the flutter performance of central-slotted plate are investigated. The results show that the critical flutter wind speed reduces with increase in angle of attack. At lower angles of attack where the plate shows the characteristics of a streamlined cross-section, the existence of central slot can improve the critical flutter wind speed. On the other hand, at larger angles of attack, where the plate becomes a bluff body, the existence of central slot further reduces the flutter performance.

Original languageEnglish
Pages (from-to)447-464
Number of pages18
JournalWind and Structures, An International Journal
Volume24
Issue number5
DOIs
StatePublished - May 2017

Keywords

  • Aerodynamic interference
  • Central-slotted plate
  • Flutter derivatives
  • Flutter performance
  • Large angles of attack

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