考虑流固耦合效应世博轴索膜结构风振研究  

Wind vibration research on cable-membrane structure of EXPO Axis considering fluid-structure interaction effect

作　　者：卢旦[1] 

机构地区：[1]上海现代建筑设计(集团)有限公司,上海200041

出　　处：《建筑结构》2013年第4期83-87,共5页Building Structure

基　　金：上海市科技人才计划项目(10QB1403500)

摘　　要：采用松耦合方法对索膜结构的风致振动问题进行研究,提出了基于三角形重心坐标系的网格变形插值新方法,并从计算精度和工程适用性的角度对一致网格和非一致网格进行了比较,提出了有效提高计算效率的实用方法。在上述研究的基础上,对上海世博轴索膜结构的风致流固耦合问题进行了数值分析,计算结果表明:流固耦合作用将明显改变索膜结构的动力特性,在索膜结构的风振计算中不容忽视。流固耦合在世博轴索膜结构的风振响应中主要表现在静态耦合作用的增大和瞬态耦合的削弱,且前者的作用超过后者。流固耦合基本不影响大尺度涡对结构的作用。The wind-induced vibration was researched by the weak coupling algorithm. A new method on mesh deformation interpolation was proposed based on the barycentrie coordinate system of triangle. Comparations were carried out between consistent grids and inconsistent ones in terms of accuracy and project adaptation. A practical method which can improve the computational efficiency effectively was proposed. A study on computation of fluid-structure interaction （FSI） on membrane structure of EXPO Axis was carried out. It is shown that the FSI which can not be neglected in wind-induced vibration calculation will significantly change the dynamic characteristics of membrane structure. FSI mainly affects on three response components： mean response, background response and resonant response. The first component increases the structural response, while the third decreases the response. FSI does not influence the large-scale vortex around the structure.

关 键 词：索膜结构 流固耦合 非一致网格 风振系数 

分 类 号：TU352.2[建筑科学—结构工程]