Comparisons of bridges flutter derivatives and generalized ones |
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Authors: | Fuyou Xu Airong Chen Zhe Zhang and Cailiang Huang |
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Affiliation: | (1) School of Civil & Hydraulic Engineering, Dalian University of Technology, Dalian, 116024, China;(2) Department of Bridge Engineering, Tongji University, Shanghai, 200092, China |
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Abstract: | The causes of the nonlinearity of self-excited aerodynamic force of bridge are interpreted from such two aspects as amplitude
and wind velocity. The concept of “generalized flutter derivative” is proposed, and its physical meaning is illustrated. The
graphs of the generalized flutter derivatives of plate and Sutong Bridge section model are plotted. The characteristics of
all generalized flutter derivatives are compared and analyzed, and their superiorities are verified. The results indicate
that the physical meaning of generalized flutter derivatives are more explicit compared to the traditional ones. It is more
convenient to understand the nonlinearity properties of self-excited aerodynamic force of bridge according to the generalized
flutter derivatives graphs with the wind velocity as the horizontal coordinate.
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Translated from Journal of Wuhan University of Technology (Transportation Science and Engineering), 2008, 32(4): 607–610 译自: 武汉理工大学学报(交通科学与工程版)] |
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Keywords: | bridge flutter derivative generalized flutter derivative self-excited aerodynamic force Sutong Bridge |
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