附加风攻角对1400m斜拉桥颤振分析结果的影响

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (17) : 95-99.

论文

附加风攻角对1400m斜拉桥颤振分析结果的影响

张宏杰1,2 朱乐东2

作者信息 +

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

ZHANG Hongjie 1,2 , ZHU Ledong2

Author information +

文章历史 +

摘要

1400m钢箱梁斜拉桥更为轻柔化，颤振性能受附加风攻角的影响不容忽视。在对其进行频域颤振分析时，不同的颤振导数识别风洞试验以及不同的颤振分析方法对于附加风攻角的包含程度各不相同，将两者组合使用后导致得到的颤振分析结果也势必存在差异。而在这些结果中哪些分析结果更为合理有待明确。通过对比四种可能情况下得到的颤振分析结果，1400m钢箱梁斜拉桥在附加风攻角的影响下，颤振分析结果体现了下述规律：基于强迫振动节段模型试验得到的颤振导数，采用考虑附加风攻角影响的颤振分析方法，得到的颤振分析结果更为合理；而基于自由悬挂节段模型试验得到的颤振导数，采用不考虑附加风攻角影响的颤振分析方法，得到的颤振分析结果仅部分包含了附加风攻角的影响；其他两种情况下得到的颤振分析结果均不正确。

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.

导出引用

张宏杰;朱乐东 . 附加风攻角对1400m斜拉桥颤振分析结果的影响[J]. 振动与冲击, 2013, 32(17): 95-99

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