Multimode flutter of long-span cable-stayed bridge based on 18 experimental aeroelastic derivatives

This paper presents flutter analysis of a super-long span (central span 1020 m) cable-stayed bridge based on experimentally extracted 18 flutter derivatives. In the analysis, the aeroelastic forces to be used in the equation of motion utilize rational function approximation of flutter derivatives. T...

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Bibliographic Details
Published inJournal of wind engineering and industrial aerodynamics Vol. 96; no. 1; pp. 83 - 102
Main Authors Mishra, Shambhu Sharan, Kumar, Krishen, Krishna, Prem
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Ltd 2008
Elsevier Science
Subjects
Aeroelasticity
Applied sciences
Bridges
Buildings. Public works
Cable-stayed bridges
Climatology and bioclimatics for buildings
Derivatives
Eigenvalues
Equations of motion
Exact sciences and technology
Flutter
Flutter derivatives
Long-span cable-stayed bridge
Mathematical analysis
Multimode approach
Rational function approximation
Self-excited forces
State space form
Stresses. Safety
Structural analysis. Stresses
Suspension bridges. Stayed girder bridges. Bascule bridges. Swing bridges
Vibration
Long-span cable-stayed bridge
Self-excited forces
State space form
Flutter derivatives
Rational function approximation
Multimode approach
Modal analysis
Equation of motion
Aeroelastic flutter
Aerodynamics
Experimental study
Modeling
Natural frequency
Stayed girder bridge
Drag
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Summary:This paper presents flutter analysis of a super-long span (central span 1020 m) cable-stayed bridge based on experimentally extracted 18 flutter derivatives. In the analysis, the aeroelastic forces to be used in the equation of motion utilize rational function approximation of flutter derivatives. The equation of motion is finally recast into aeroelastically modified modal state space form, which yields an unsymmetric eigenvalue problem. The complex eigenvalues thus obtained are used to identify the critical flutter condition. The numerical analysis is performed on a three-dimensional (3D) finite element model of the bridge. The results show that critical flutter velocity based on theoretical flutter derivatives is exceptionally higher than that based on experimental flutter derivatives.
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ISSN:0167-6105
1872-8197
DOI:10.1016/j.jweia.2007.03.006