不同风向下某多层建筑表面风压数值模拟  

Simulation on wind pressure of single-story buildings under different wind directions

作　　者：刘海亮 Liu Hailiang(Weifang Second Construction Engineering Company,Weifang Shandong 261021,China)

机构地区：[1]潍坊市第二建筑工程公司,山东潍坊261021

出　　处：《山西建筑》2024年第6期61-65,共5页Shanxi Architecture

摘　　要：针对单体多层无开洞建筑房屋开展了CFD数值模拟表面风压研究,采用ICEM软件建立风场数值计算模型,采用雷诺应力湍流模型、UDF自定义风速入口函数以及一阶迎风函数来定义离散控制方程的对流项,对建筑房屋模型在7个不同风向角的风速作用下的表面风压系数进行了分析。得出建筑房屋迎风面和背风面在不同风向角作用下风压系数分布规律的区别,同时验证了数值模拟结果与相关风洞试验结果趋势一致,数值基本接近。针对串列布置两栋房屋的表面风压相互干扰效应开展CFD数值模拟,定量与定性地分析不同风向下的风致干扰效应对目标房屋与施扰房屋不同位置表面风压的影响。其结果对建筑房屋表面风压的分布规律研究具有参考意义。A CFD numerical simulation study was conducted on the surface wind pressure of regular single story buildings without openings.A wind field numerical calculation model was established using ICEM software.The Reynolds stress turbulence model,UDF custom wind speed inlet function,and first-order upwind function were used to define the convection term of the discrete control equation.The surface wind pressure coefficient of the building model was analyzed under the influence of wind speeds at 7 different wind directions.The different distribution patterns of wind pressure coefficients on the windward and leeward sides of building structures under different wind directions were obtained,and it was verified that the numerical simulation results were consistent with the trend of relevant wind tunnel test results,and the values were basically close.Furthermore,CFD was conducted to analyze the interference effect of surface wind pressure on two houses arranged in a series,and to quantitatively and qualitatively analyze the impact of wind-induced interference effects under different wind directions on the wind pressure at different surfaces of the target house and the disturbed house.The results have reference significance for the study of the distribution law of wind pressure on the surface of building houses.

关 键 词：CFD数值模拟 风洞试验 表面风压系数 干扰效应 

分 类 号：TU312.1[建筑科学—结构工程]