哈大客运专线双台四线雨棚数值风洞模拟  

Numerical Simulation of Wind Tunnel of Railway Canopy without Platform Columns in Harbin-Dalian Passenger-Dedicated Line

作　　者：田承昊[1] 米宏广[1] 王彦芳[1] 齐雅荣[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300142

出　　处：《铁道标准设计》2012年第2期113-114,117,共3页Railway Standard Design

摘　　要：数值风洞方法可为复杂形体结构的风压分布确定和结构风振系数选取等提供非试验性的依据。基于Flu-ent6.3软件平台,利用标准k-ε模型,对处于大气边界层中的哈大客运专线沿线无站台柱雨棚屋盖的平均风压进行数值模拟,探讨用数值风洞模拟技术鉴别风洞模型试验可能存在的误差及其原因。基于结构表面等压线将结构表面划分为结构受风子区块,并以面积加权平均计算得到各子区的风载体型系数,为抗风设计提供可靠依据。Numerical wind tunnel method can provide non-experimental basis for determining the wind pressure distribution and wind-induced vibration factor of the complex-shaped structure.As an example,located in the atmospheric boundary and along Harbin-Dalian Passenger-Dedicated Line,the mean wind pressure of the canopies without platform columns are obtained,and the possible errors and their reasons of the wind tunnel test are also identified,by using the numerical method with the Fluent6.3 software and standard k-ε model.According to the wind pressure contours,the surface of the structure is divided into several sub-areas subjected to different wind actions and then the wind load shape coefficient of each sub-areas is obtained by calculating the area-weighted average.The results can provide reliable basis for the design of wind resistance.

关 键 词：哈大客运专线 数值风洞 空间结构 风场 体型系数 

分 类 号：TU312.1[建筑科学—结构工程]