东南大学学报（自然科学版）2026，Vol.56Issue(7)：1017-1026,10.DOI:10.3969/j.issn.1001-0505.2026.07.009
风洞试验中上游地表粗糙度设置对风场与荷载预测精度的影响
Influence of upstream fetch roughness setup on the accurate prediction of wind field and load in wind tunnel tests
摘要
Abstract
This paper investigates the application of exposure roughness in the field of wind engineering.A comparative analysis of wind load provisions from different countries reveals how variations in roughness pa-rameters affect design wind pressures.Wind tunnel experiments with two distinct upstream exposure rough-ness conditions are conducted to further investigate the influence of exposure type on the urban atmospheric boundary layer and pedestrian-level wind environment,and to quantify its effect on the accuracy of urban wind field simulations.The results show that appropriate selection of the upstream exposure type immediately is critical for accurate urban wind profile simulation.The parameter regulations for different exposure types in Chinese code yields higher wind speed predictions at elevated heights than other codes,potentially overestimat-ing design wind pressures.Compared with the mean wind speed profile,the upstream exposure type exerts a stronger influence on the turbulence intensity profile,where insufficient upstream fetch length may introduce substantial errors.Additionally,exposure type significantly affects pedestrian-level wind environment simula-tions.When the prevailing wind aligns with the main street orientation,an upstream exposure with excessively low roughness can accelerate street canyon wind speeds,leading to errors exceeding 30%.关键词
地表粗糙度/风荷载规范/设计风压/风环境/城市大气边界层/行人风环境Key words
exposure roughness/wind load provision/design wind pressure/wind environment/urban atmo-sphere boundary layer/pedestrian-level wind environment分类
建筑与水利引用本文复制引用
于舰涵,李曼琦,李明水,李少鹏,李霁洪..风洞试验中上游地表粗糙度设置对风场与荷载预测精度的影响[J].东南大学学报（自然科学版）,2026,56(7):1017-1026,10.基金项目
国家自然科学基金资助项目(52308533,52578607) （52308533,52578607）
四川省自然科学基金资助项目(2025HJRC0014,2025ZNSFSC1289,2025ZNSFSC0413). （2025HJRC0014,2025ZNSFSC1289,2025ZNSFSC0413）
