基于CFD的桥梁三分力系数识别的数值研究  

CFD-based Numerical Research in the Identifying of Tri-component Force Coefficient of Bridge

作　　者：瞿伟廉[1] 刘琳娜[1] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点实验室,武汉430070

出　　处：《武汉理工大学学报》2007年第7期85-88,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金重大国际合作项目(50520130296)

摘　　要：用CFD方法研究桥梁周围的风场特征,不仅能得到流场的压力、速度和涡旋的分布,还能提取桥梁的各种气动参数。对以一大跨度桥梁断面为例的扁平单箱梁模型进行了不同攻角下的三分力系数CFD数值识别,将识别结果与风洞试验值进行了对比,并画出了0°攻角下的压强和速度分布图,验证了采用CFD技术识别桥梁三分力系数方法的可行性与可靠性。The anslysis of Computational Fluid Dynamics can study the attribution of wind field around the bridge, which is not only able to get the distribution of pressure, velocity and eddy but also can extract various aerodynamic parameters. In this paper, an example of the sectional model of single flat boxing beam of an bridge was used to extract the coefficient of tri-component from different wind angle of attack by CFD method. By making a comparison between the calculation results by CFD and the wind tunnel test results, and drawing the pressure profile and the velocity profile, we can certificate the CFD technology in extracting coefficient of tri-component is reliable and feasible.

关 键 词：CFD方法 三分力系数 桥梁断面 

分 类 号：U441[建筑科学—桥梁与隧道工程]