缆索承重桥梁关键风效应的多尺度物理和数值模拟的基础研究

This project mainly aims at the relationship beneficial to the people's livelihood of the national important foundation facilities – long-span cable-supported bridges, and exploring the fundamental problem of multi-scale physical and numerical simulation from the wind effect sensitivity. Using theoretical analysis, physical experiment, numerical simulation and field measurement results, this project focus on solving some key scientific problems, including physical wind tunnel simulation in model effect, scale effect and the effect of Reynolds number, numerical wind tunnel simulation in 2D/3D numerical simulation effect, the whole wind-speed process and turbulence simulation methods, full scale real bridge measurement in the authenticity, reliability and validity of key scientific problems. The expected result involves in the formation and construction of nonlinear aerodynamic model for long-span cable-supported bridge sections, aerodynamic parameter identification of multi-scale physical wind tunnel methods and a series of numerical wind tunnel methods, structural response of physical and numerical simulation method for the whole wind-speed process and the multi-scale simulation and verification of bridge structural wind effects and control effect. This project has not only theoretical significance in advance, and has important application value, combined with the reasonable technology route and the solid foundation of the research team, and is expected to be fully completed the research content, to achieve the desired objectives, laying a solid theoretical basis for the establishment of a new long-span bridge wind resistance design and research theory and method.

本项目主要针对关系国计民生的国家重大基础设施——大跨度缆索承重桥梁，从结构风效应敏感性的角度探索多尺度物理和数值模拟的基础问题，采用理论分析、物理实验、数值模拟和现场实测等研究手段，着重解决物理风洞试验模拟的模型效应、尺度效应和雷诺数效应，数值风洞试验模拟的二维/三维效应、风速全过程效应和湍流模拟方法，实桥足尺试验结果的真实性、有效性和可靠性等关键科学问题。预期形成和建立大跨度缆索承重桥梁断面非线性气动力理论模型、气动参数识别的多尺度物理风洞方法和系列数值风洞方法、风速全过程结构响应的物理与数值模拟方法以及桥梁结构风效应及控制效应的多尺度模拟验证。本项目不仅具有超前的理论意义，而且具有重大的应用价值，结合可行合理的技术路线和基础扎实的研究团队，可望全面完成研究内容、达到预期研究目标，为建立现代大跨度桥梁抗风设计研究理论与方法奠定坚实的理论基础。

本项目主要针对关系国计民生的国家重大基础设施——大跨度缆索承重桥梁，从结构风效应敏感性的角度探索多尺度物理和数值模拟的基础问题，采用理论分析、物理实验、数值模拟和现场实测等研究手段，着重解决物理风洞试验模拟的模型效应、尺度效应和雷诺数效应，数值风洞试验模拟的二维/三维效应、风速全过程效应和湍流模拟方法，实桥足尺试验结果的真实性、有效性和可靠性等关键科学问题。预期形成和建立大跨度缆索承重桥梁断面非线性气动力理论模型、气动参数识别的多尺度物理风洞方法和系列数值风洞方法、风速全过程结构响应的物理与数值模拟方法以及桥梁结构风效应及控制效应的多尺度模拟验证。本项目不仅具有超前的理论意义，而且具有重大的应用价值，结合可行合理的技术路线和基础扎实的研究团队，可望全面完成研究内容、达到预期研究目标，为建立现代大跨度桥梁抗风设计研究理论与方法奠定坚实的理论基础。