温室结构风振效应的数值模拟  

Numerical analysis on wind vibration effect on greenhouse structures

作　　者：雷隽卿[1] 王东霞 蒋秀根[1] 李保明[1] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]中铁工程设计咨询集团有限公司,北京100020

出　　处：《中国农业大学学报》2007年第4期85-89,共5页Journal of China Agricultural University

基　　金：北京市教育委员会都市农业学科群建设项目(XK100190553)

摘　　要：根据大气边界层风的特性,利用CFD方法,采用N-S方程、湍流κ-ε模型及壁面函数法对空气湍流进行了数值模拟;采用有限元方法对温室结构模型进行离散,利用大型通用有限元分析软件ANSYS,对脉动风下考虑流-固耦合的温室结构进行了数值模拟计算和分析。结果表明,脉动风作用下,结构最大位移为0.21 m,与平均风压作用下的结构最大位移0.007 4 m相比显著增大。认为进行温室结构设计时,应考虑流-固耦合作用下的脉动风效应。According to the wind characteristics in the atmospheric boundary layer, turbulence was simulated in this paper by using the method of CFD, adopting N-S equation, turbulence κ-ε model, and wall function method. Greenhouse structures were dispersed by member FEM. The greenhouse structures considering fluid-structure interaction under the fluctuating wind were numerically simulated by using the commercial software-ANSYS. The results from the simulation proved that the maximal displacement of the structure due to wind vibration effect was 0.21 m and the increment was distinct compared with 0.007 4 m caused by normal wind. fluid-structure interaction to greenhouse structures.

关 键 词：温室结构 湍流 脉动风 流-固耦合 

分 类 号：TU311.2[建筑科学—结构工程]