摘要
以某体育场双侧大悬挑屋盖平均风压数值风洞模拟为例,重点讨论有限元网格划分,同时涉及适合该类体育场的数值风洞大小、风洞边界条件、湍流模型和对流项插值阶数等影响数值计算精度的几个关键因素,可为同类复杂结构数值模拟提供参考.给出1个风向下该体育场双侧悬挑屋盖部分平均风压数值仿真结果,并与风洞实验结果比较,两者结果接近,说明用数值仿真方法模拟复杂大跨屋盖结构是有效的.
Taking the numerical simulation of wind pressure distribution on a stadium roof as an example, the mesh division of finite element is emphasized. At the same time, several key factors which fit this kind of stadium and influent precision of numerical calculation, such as fluid domain size, boundary condition of wind tunnel, turbulence model, and order of convective term＇ s discretization, are discussed. These factors can provide reference for similar complex structures. Some results of numerical simulation on average wind pressure on stadium are given and compared with results of wind tunnel experiment. Both results are similar. So the numerical simulation can be effectively used for simulation on complex roof structure with long span.
出处
《计算机辅助工程》
2007年第3期38-42,共5页
Computer Aided Engineering
关键词
数值模拟
风洞
网格划分
湍流模型
对流项插值阶数
平均风压
有限元
CFX5
numerical simulation
wind tunnel
mesh division
turbulence model
order of convective term＇ s discretization
average wind pressure
finite element
CFX 5
