摘要
结合凉都体育场的建筑造型和周围环境,采用Realizablek-ε湍流模型对屋盖的平均风压进行了数值模拟,得到屋盖的平均风压分布.利用MATLAB编制了线性滤波器的自回归法(AR法)的脉动风速时程模拟程序,模拟了屋盖节点的脉动风速时程;并结合屋盖的平均风压和脉动风速时程数值模拟结果,编制了时域法风振效应分析程序,分析了牛角形屋盖的风致响应规律,得出了屋盖的位移风振系数.研究了屋面荷载、平均风速、结构阻尼比等参数对牛角形屋盖风振系数的影响,得出一定偏差范围内可忽略上述参数取值偏差对牛角形屋盖风振响应影响的结论.
Analysis of wind pressure is carried out using numerical wind tunnel for horn-shaped roof in Liangdu Stadium,and wind pressure distribution for all directions is obtained.A simulation program based on auto-regressive method is developed using MATLAB language to simulate the time-history of wind velocity of all nodes in horn-shaped roof.Based on the wind pressure coefficient obtained by numerical wind tunnel and time-history of wind velocity obtained by auto-regressive method,the wind vibration response of horn-shaped roof is analyzed using ANSYS software and the wind vibration coefficient for all wind directions is obtained.Furthermore,the effect of roof load,structural damping ratio and average velocity on the wind vibration response is analyzed.The results show that these parameters have little effect on wind vibration response of horn-shaped roof.
出处
《空间结构》
CSCD
北大核心
2010年第4期60-66,共7页
Spatial Structures
基金
教育部新世纪优秀人才支持计划资助项目(NCET-06-0228)
天津市科委应用基础及前沿技术研究计划重点项目(200890)
关键词
牛角形屋盖
数值风洞
平均风压系数
AR法
时域法
风振系数
参数分析
horn-shaped roof
numerical wind tunnel
wind pressure coefficient
AR method
time-domain analysis
wind vibration factors
parameter analysis
