漏斗形开敞式膜结构的风致振动效应分析

采用谐波叠加法模拟风速时程，将风速时程转换为风荷载时程施于漏斗形膜结构，分析膜结构风振响应，获得结构各区块风致动力放大系数.计算表明：漏斗形敞开式膜结构各节点位移响应较为稳定且具有周期性，速度响应曲线和加速度响应曲线均较稳定；结构表面不同部位的风振响应差别较大，迎风面的风致动力放大系数较高，背风面风致动力放大系数平缓.

Analysis of Wind-induced Vibration Effects of a Funnel-shaped Open Membrane Structure

By using the harmony superposition method (HSM), the wind velocity time history was simulated and converted to wind load time series. Applying the wind load time series to funnel-shaped open membrane structure(FOMS), the structural wind-induced vibration response and the wind-induced dynamic magnification factor were numerically investigated. The results revealed that the wind-induced nodal displacement, the velocity and acceleration responses of FOMS were stable, and the statistics for the wind-induced nodal displacement time history followed the Gaussian distribution. Furthermore, the wind induced dynamic magnification factor related to different parts of the structure varied significantly and the wind induced dynamic magnification factor on the windward part of structural system was greater than that on the leeward part.