漏斗形开敞式膜结构的风致振动效应分析  

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

作　　者：周岱[1] 钱锟[1] 马骏[1] 韩兆龙[1] 洪荣华[1] 季清[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《上海交通大学学报》2013年第6期862-866,871,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51078230;11172174);上海市优秀学术带头人计划(13XD1402100)资助

摘　　要：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.By using the harmony superposition method （HSM）, the wind velocity time history was simula- ted and converted to wind load time series. Applying the wind load time series to funnel-shaped open mem- brane 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 dis placement, the velocity and acceleration responses of FOMS were stable, and the statistics for the wind-in- duced 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-in- duced dynamic magnification factor on the windward part of structural system was greater than that on the leeward part.

关 键 词：膜结构 风速时程模拟 风致动力放大系数 

分 类 号：TU312.1[建筑科学—结构工程] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]