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Complex flutter-model analysis for coupled gust response of the Akashi Kaikyo Bridge model

机译：明石海峡大桥模型耦合阵风响应的复杂颤振模型分析

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An analytical approach for the coupled gust response of long-span bridges is presented. The calculation scheme is based on the direct complex eigen-analysis of the integrated system of the three-dimensional FEM model of a long-span bridge and the aerodelastic forces. Actual vibration modes of the bridge in wind flow, which were so-called Complex-flutter Modes, are appropriately determined at each mean wind speed. A complex modal analysis scheme is then formulated for the gust response analysis in either time or frequency domains. By using the complex flutter-modes, the aeroelastic coupled gust resonses are effectively cabtured and interpreted. A numerical example is made for the Akashi Kaikyo Bridge model. The calculated results agree very well with the experimental ones. Effects by the uses of spatial coherence, turbulent spectra, and some other factors on the gust response are then addressed.
机译：提出了一种大跨度桥梁耦合阵风响应的解析方法。该计算方案基于大跨度桥梁三维有限元模型与气动弹性力的综合系统的直接复本征分析。在每个平均风速下适当确定桥梁在风流中的实际振动模式，即所谓的复振颤模式。然后为时域或频域中的阵风响应分析制定了复杂的模态分析方案。通过使用复杂的颤振模式，可以有效地绘制和解释气动弹性耦合阵风共振。以明石海峡大桥模型为例。计算结果与实验结果非常吻合。然后解决了空间连贯性，湍流谱和一些其他因素对阵风响应的影响。

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