1. New consideration on flutter properties based on step-by-step analysis
- Author
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Matsumoto, Masaru, Matsumiya, Hisato, Fujiwara, Shinya, and Ito, Yasuaki
- Subjects
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FLUTTER (Aerodynamics) , *STRUCTURAL plates , *LONG-span bridges , *SELBERG trace formula , *TORSION , *DEGREES of freedom - Abstract
Abstract: This paper studies the coupled flutter mechanism of plate and long span bridges based on step-by-step analysis (SBS). Fundamental flutter modes are defined based on amplitude ratio and phase difference between heaving and torsional motions. Furthermore, a formula remarkably similar to the Selberg formula can be derived by use of the particular simplified flutter-onset condition. In the process of SBS analysis, some torsional divergent velocities where the torsional rigidity becomes zero can be defined. Finally, the flutter-behavior of an elastic model of the complete Akashi-Kaikyo Bridge, which is the longest suspension bridge in the world, is studied from the point of view of flutter in 2 degrees of freedom, namely heaving and torsional motion, taking into account the structural coupling effect of additional torsional displacement induced by horizontal displacement as a structural coupling property. [Copyright &y& Elsevier]
- Published
- 2010
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