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Flutter and Torsional Instability

  • R. L. Wardlaw
Part of the International Centre for Mechanical Sciences book series (CISM, volume 335)

Abstract

The term “flutter” derives from aeronautical practice where it is used to describe an aeroelastic instability in coupled torsion and vertical bending of aircraft wings. The road decks of long span bridges are prone to a related oscillatory response as well as a single-degree-of-freedom torsional instability. These phenomena may result in destructive levels of amplitude and it is essential that the incipient wind speeds for their occurrence be above the maximum values expected at the bridge site. Structural components such as I-beam section deck hangers used in arch bridges are also prone to torsional instability. In this chapter the analytical framework for analysis of the response is discussed and aerodynamic approaches to improving the aerodynamic stability are presented. The effects on response of the free stream turbulence in the atmospheric surface wind layer are described. Attention is focussed on the critical erection phase response of cable-stayed bridges.

Keywords

Wind Tunnel Suspension Bridge Tune Mass Damper Aircraft Wing Stay Cable 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Wien 1994

Authors and Affiliations

  • R. L. Wardlaw
    • 1
  1. 1.National Research CouncilOttawaCanada

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