龙卷风作用下双坡屋盖风荷载特性数值模拟研究  

NUMERICAL SIMULATION OF WIND LOAD CHARACTERISTICS OF DOUBLE SLOPE ROOF UNDER TORNADO

作　　者：孙建波 SUN Jianbo(Harbin Institute of Technology Architectural Design and Research Co.,Ltd.,Harbin 150090,China)

机构地区：[1]哈尔滨工业大学建筑设计研究院有限公司,哈尔滨150090

出　　处：《低温建筑技术》2022年第10期112-115,共4页Low Temperature Architecture Technology

摘　　要：为了探究龙卷风作用下双坡屋盖风荷载分布特性以及坡角的影响规律,文中阐述龙卷风作用下的双坡屋面风荷载的数值模拟,从龙卷风形成的机理和过程,到利用CFD数值模拟研究龙卷风作用双坡屋面的风压分布规律。研究龙卷风双坡屋面模拟的过程,从静止到匀速平移龙卷风作用下的双坡屋面,最后到非匀速平移龙卷风作用下的双坡屋面。介绍龙卷风建模、划分网格、计算参数设置等数值模拟的全过程,最后分析涡流比、地面粗糙度等因素对龙卷风风压、风速、核心半径和双坡屋面风压的影响,以及展望研究龙卷风双坡屋面风荷载数值模拟的未来发展。The distribution characteristics of wind load on the double pitched roof and the influence law of slope angle under tornado was investigated by numerical simulation method. The mechanism and process of tornado formation was simulated to study the distribution law of wind pressure on the double pitched roof, in which tornado modeling, grid division, and calculation parameter setting was detailed via CFD software. The response of the gable roof under translational tornado from the static to the uniform, and to the non-uniform was studied. The influence of eddy current ratio, ground roughness, and other factors on tornado wind pressure, wind speed, core radius, and wind pressure of double pitched roof was analyzed. Future development on present research was raised.

关 键 词：龙卷风 数值模拟 涡流比 核心半径 

分 类 号：TU311.3[建筑科学—结构工程]