欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
由于索穹顶是一种具有很强风振敏感性的大跨柔性结构，所以在风振计算中气动阻尼对结构风振响应有着至关重要的影响，研究这一问题的主要途径之一就是从实测数据中有效地识别出气动阻尼并找出气动阻尼比随结构及风激励参数的变化规律。基于肋环型索穹顶结构气弹模型风洞试验结构位移及加速度时程数据，联合采用经验模态分解法、改进的随机减量法及Hilbert变换来识别结构的气动阻尼，计算结果表明该方法简便、稳定、有效。应用此识别方法提取气弹试验模型中各测点的低阶气动阻尼比并在此基础上总结了肋环型索穹顶结构中气动阻尼比随风速及风向角等参数的变化规律，为考虑来流与结构耦合时索穹顶结构的风振分析提供了重要的参考依据。
英文摘要：
Because cable dome is a type of long-span structure that is highly sensitive to wind vibration, me aerodynamic damping is of vital importance in the analysis of wind-induced vibration. In this aspect, a main approach is to identify the aerodynamic damping from test data and to get the effects of the parameter such as wind speed and excitation angle. Based on the displacement and acceleration data of an aeroelastie wind tunnel test of the Geiger type cable dome model, empirical mode decomposition method, improved random decrement technique and Hilbert transformation are combined to identify the aerodynamic damping, and the results comfirm that the method is simple, stable and effective. Based on the method, the low-order aerodynamic damping ratio of all test points are distilled for the aeroelastic cable dome model and conclusions are drawn about the relationship between aerodynamic damping ratio, wind speed and excitation direction. The results provide an important reference for wind-induced vibration analysis of the cable dome when considering the effect of coupling between structure and flow.
同期刊论文项目
同项目期刊论文
Simple approach for force finding analysis of circular Geiger domes with consideration of self-weigh
Shape determination problem of spatial cable-frame type of suspended single-layer reticulated shells
Tensegrity structures with buckling members explain nonlinear stiffening and reversible softening of
期刊信息
位置：