The Influence of Additional Attack Angle on Flutter Analysis Result of 1400m Cable Stayed Bridge

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (17) : 95-99.

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The Influence of Additional Attack Angle on Flutter Analysis Result of 1400m Cable Stayed Bridge

ZHANG Hongjie 1,2 , ZHU Ledong2

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Abstract

Due to low rigidity, the influence of addition attack angle to the flutter performance of 1400m steel box girder cable stayed bridge can not be neglected. In the flutter analysis process, the including level of additional attack angles are different to different wind tunnel tests used for identification of flutter derivatives, and so to different theoretical arithmetic methods. As a result, the differences between the results obtained by complex application of wind tunnel test and flutter analysis method can not be avoid. By contrasting the analysis results derived from four possible situations, under the influence of additional attack angle, some disciplinarians of flutter analysis result can be summarized as follows: the result which based on flutter derivatives obtained from forced vibration section model test and taking additional attack angle into consideration in flutter analysis method is more reasonable; the result which based on flutter derivatives obtained from free hanging section model test and without taking additional attack angle into consideration in flutter analysis method can’t contain the influence of additional attack angle completely; the results obtained from the other two situations are not reasonable.

Key words

additional attack angle / forced vibration section model test / free hanging section model test / flutter analysis in frequency domain / long span bridge

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ZHANG Hongjie;;ZHU Ledong. The Influence of Additional Attack Angle on Flutter Analysis Result of 1400m Cable Stayed Bridge [J]. Journal of Vibration and Shock, 2013, 32(17): 95-99