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基于Allan Larsen广义单自由度涡激振动模型,借鉴Wilkinson沿跨向涡激力相关性函数试验结果,建立大跨度桥梁主梁沿跨向涡激振动描述体系,并探讨节段模型试验识别气动参数方法。以一座大跨斜拉桥为例,在考虑了振型、涡激力相关性和阻尼作用后,根据主梁节段模型风洞试验识别气动参数,并计算其沿跨向竖向涡振响应。
Based on the Allan Larsen generalized single-degree-of-freedom vortex-induced vibration model and the results of Wilkinson along the transversal vortex-induced linear function test, a description system of longitude span vortex-induced vibration of long-span bridges is established and the model identification of aerodynamic parameters method. Taking a long-span cable-stayed bridge as an example, aerodynamic parameters are identified according to the wind tunnel test of girder segment model after considering the mode shapes, the correlation of vortex-induced force and the damping effect. .