指廊式航站楼风荷载特性的CFD数值计算方法定量研究  

Quantitative Study on CFD Simulation of Pier Finger Terminals under Wind Loads

作　　者：黄政 颜卫亨[2] Huang Zheng;Yan Weiheng(North China Municipal Engineering Design &Research Institude,Tianjin 300074,China;School of Civil Engineering Chang an University ,Xi'an 710061,China)

机构地区：[1]中国市政工程华北设计研究总院有限公司,天津300074 [2]长安大学建筑工程学院,西安710061

出　　处：《特种结构》2019年第5期1-8,共8页Special Structures

摘　　要：为了建立指廊式航站楼CFD数值计算方法,基于流体动力学基本原理和大气边界层理论,运用计算流体动力学软件对指廊式航站楼风荷载特性进行CFD数值计算技术的基础性研究。通过与风洞试验数据对比分析与探讨,得到CFD数值计算的网格划分技术、湍流模型选取、离散格式和求解算法等关键技术及参数,并对航站楼在风速为13m/s、24个不同风向角下的平均风压系数进行CFD数值计算方法精度评估。结果表明,CFD抗风设计数值方法可以有效地预测指廊式航站楼的风荷载,在建筑风场的定性和定量分析上具有一定的可靠度。据此,可以探究指廊式航站楼在风力作用下合理的建筑气动外形,为风荷载作用下建筑结构方案设计和结构体型优化提供设计方法和理论依据。The CFD numerical calculation of wind load characteristics for pier finger terminal design has been studied using computational fluid dynamics CFD software based on the fundamental principles of fluid dynamics and atmospheric boundary layer theory. The main parameters and key techniques including meshing algorithms turbulence model selection discrete formatting and solving algorithm in CFD numerical modeling were refined through comparison with the wind tunnel test data. Then the validation of this method is evaluated by mean wind pressure coefficient with a constant wind velocity of 13m/ s but in 24 different directions. The re- sults showed that CFD numerical calculation method can accurately simulate the pier finger terminals under wind loads. This method is reliable in the qualitative and quantitative analysis of buildings wind flow field. Thus it can be used to create proper aerodynamic shaping of pier finger terminals under wind load. This study provides guidance and theoretical basis for design schemes and building shape optimization under wind load.

关 键 词：计算流体动力学 指廊式航站楼 CFD数值计算 参数分析 网格划分技术 平均风压系数 

分 类 号：TU312.1[建筑科学—结构工程]