摘 要
大跨度空间结构因其独特的形态和功能需求，在现代建筑中得到广泛应用，但其对风荷载的响应特性复杂且敏感，成为工程设计中的关键科学问题。本文旨在深入分析大跨度空间结构在不同风场条件下的动力响应特征及其控制机制。研究采用数值模拟与实验验证相结合的方法，基于计算流体动力学（CFD）技术构建精细化风场模型，并结合随机振动理论评估结构的风致响应。通过对比典型结构形式在多种风速、风向角及湍流强度下的表现，揭示了结构几何参数与风荷载作用之间的内在关系。研究发现，非线性气动效应在高风速条件下显著影响结构的动力响应，而传统线性化方法可能低估其风险。为此，本文提出了一种改进的风荷载谱模型，能够更准确地预测复杂风场中的结构响应。研究成果为大跨度空间结构的设计优化与抗风性能提升提供了重要参考，同时为相关规范的修订和完善奠定了理论基础。
关键词：大跨度空间结构; 风荷载响应; 非线性气动效应; 风荷载谱模型; 计算流体动力学（CFD）
Abstract
Long-span spatial structures have been widely applied in modern architecture due to their unique forms and functional requirements; however, their complex and sensitive responses to wind loads have become a critical scientific issue in engineering design. This study aims to analyze the dynamic response characteristics and control mechanisms of long-span spatial structures under various wind field conditions. A combined approach of numerical simulation and experimental validation is employed, utilizing computational fluid dynamics (CFD) technology to construct refined wind field models and incorporating stochastic vibration theory to evaluate wind-induced structural responses. By comparing the performance of typical structural configurations under multiple wind speeds, wind direction angles, and turbulence intensities, the intrinsic relationship between structural geometric parameters and wind load effects is revealed. The findings indicate that nonlinear aerodynamic effects significantly influence the dynamic responses of structures at high wind speeds, while traditional linearized methods may underestimate the associated risks. To address this, an improved wind load spectrum model is proposed, which can more accurately predict structural responses in complex wind fields. The research outcomes provide essential references for the design optimization and wind resistance enhancement of long-span spatial structures, as well as a theoretical basis for revising and improving relevant standards.
Key words:Large-Span Space Structure; Wind Load Response; Nonlinear Aeroelastic Effect; Wind Load Spectrum Model; Computational Fluid Dynamics (CFD)
目 录
中文摘要 I
英文摘要 II
引 言 1
第1章、风荷载特性分析 3
1.1、风速与风压分布特征 3
1.2、风场模拟方法研究 3
1.3、动力风荷载建模技术 4
第2章、大跨度结构动力特性 5
2.1、结构振动模式分析 5
2.2、模态参数识别方法 5
2.3、动力响应敏感性评估 5
第3章、风致响应计算方法 7
3.1、时间域响应分析技术 7
3.2、频率域响应计算方法 7
3.3、非线性效应影响研究 8
第4章、工程应用与优化设计 9
4.1、实际工程案例分析 9
4.2、风荷载作用下的减振策略 9
4.3、设计规范与改进方向 9
结 论 11
参考文献 12
大跨度空间结构因其独特的形态和功能需求，在现代建筑中得到广泛应用，但其对风荷载的响应特性复杂且敏感，成为工程设计中的关键科学问题。本文旨在深入分析大跨度空间结构在不同风场条件下的动力响应特征及其控制机制。研究采用数值模拟与实验验证相结合的方法，基于计算流体动力学（CFD）技术构建精细化风场模型，并结合随机振动理论评估结构的风致响应。通过对比典型结构形式在多种风速、风向角及湍流强度下的表现，揭示了结构几何参数与风荷载作用之间的内在关系。研究发现，非线性气动效应在高风速条件下显著影响结构的动力响应，而传统线性化方法可能低估其风险。为此，本文提出了一种改进的风荷载谱模型，能够更准确地预测复杂风场中的结构响应。研究成果为大跨度空间结构的设计优化与抗风性能提升提供了重要参考，同时为相关规范的修订和完善奠定了理论基础。
关键词：大跨度空间结构; 风荷载响应; 非线性气动效应; 风荷载谱模型; 计算流体动力学（CFD）
Abstract
Long-span spatial structures have been widely applied in modern architecture due to their unique forms and functional requirements; however, their complex and sensitive responses to wind loads have become a critical scientific issue in engineering design. This study aims to analyze the dynamic response characteristics and control mechanisms of long-span spatial structures under various wind field conditions. A combined approach of numerical simulation and experimental validation is employed, utilizing computational fluid dynamics (CFD) technology to construct refined wind field models and incorporating stochastic vibration theory to evaluate wind-induced structural responses. By comparing the performance of typical structural configurations under multiple wind speeds, wind direction angles, and turbulence intensities, the intrinsic relationship between structural geometric parameters and wind load effects is revealed. The findings indicate that nonlinear aerodynamic effects significantly influence the dynamic responses of structures at high wind speeds, while traditional linearized methods may underestimate the associated risks. To address this, an improved wind load spectrum model is proposed, which can more accurately predict structural responses in complex wind fields. The research outcomes provide essential references for the design optimization and wind resistance enhancement of long-span spatial structures, as well as a theoretical basis for revising and improving relevant standards.
Key words:Large-Span Space Structure; Wind Load Response; Nonlinear Aeroelastic Effect; Wind Load Spectrum Model; Computational Fluid Dynamics (CFD)
目 录
中文摘要 I
英文摘要 II
引 言 1
第1章、风荷载特性分析 3
1.1、风速与风压分布特征 3
1.2、风场模拟方法研究 3
1.3、动力风荷载建模技术 4
第2章、大跨度结构动力特性 5
2.1、结构振动模式分析 5
2.2、模态参数识别方法 5
2.3、动力响应敏感性评估 5
第3章、风致响应计算方法 7
3.1、时间域响应分析技术 7
3.2、频率域响应计算方法 7
3.3、非线性效应影响研究 8
第4章、工程应用与优化设计 9
4.1、实际工程案例分析 9
4.2、风荷载作用下的减振策略 9
4.3、设计规范与改进方向 9
结 论 11
参考文献 12
