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首页> 外文会议>IABSE Conference: Structural Engineering: Providing Solutionso Global Challenges >Buffeting response of long span bridges: numerical-experimental validation of fluid-structure interaction models
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Buffeting response of long span bridges: numerical-experimental validation of fluid-structure interaction models

机译：大跨度桥梁的抖振响应：流固耦合模型的数值试验验证

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Estimates of the buffeting response of long-span bridges rely on numerical models that require asrninput the dynamic finite element model of the bridge, the turbulence characteristics of thernincoming wind, and the model for the fluid-structure interaction. Nowadays the first two inputsrnare reliable and do not require deeper investigations, but fluid-structure interaction models havernmargins for improvement in their accuracy. While from a numerical and analytical point of viewrnthese models have been developed and studied in detail, their experimental validation is still anrnopen issue. Indeed, the numerical-experimental comparison is often done against the responsernwind-tunnel models, either full-aeroelastic or sectional models, which have some intrinsicrnlimitations: for example, uncertainties related to the small geometrical scale for full-aeroelasticrnmodels, or the non-deformability of the deck in sectional models. To overcome some of therncurrent limitations, in this paper a large-scale deformable aeroelastic model is proposed. Thernexperimental results should be used as a benchmark study for the accuracy of numerical modelsrnfor the buffeting response of long-span bridges.
机译：大跨度桥梁的抖振响应估计依赖于需要输入桥梁动态有限元模型，来风的湍流特性以及流固耦合模型的数值模型。如今，前两个输入是可靠的，不需要更深入的研究，但是流固耦合模型需要提高精度的裕度。尽管从数值和分析的角度出发，已经对这些模型进行了详细的研究和开发，但是它们的实验验证仍然是一个悬而未决的问题。确实，数值实验比较通常是针对响应风洞模型（全气动弹性模型或截面模型）进行的，这些模型具有一些固有的局限性：例如，与全气动弹性模型的几何尺寸较小相关的不确定性或非变形性截面模型中甲板的轮廓。为了克服当前的一些局限性，本文提出了一种大规模的可变形气动弹性模型。实验结果应作为大跨度桥梁抖振响应数值模型精度的基准研究。

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