摘要
针对作用于通信角钢塔的风荷载特点,将风荷载中脉动风视为平稳的高斯随机过程。从随机理论出发,考虑空间相关性,采用谐波合成法模拟出脉动风荷载的时程曲线。所采用的人工模拟风速时程曲线可应用于一般高耸结构的脉动风荷载模拟,符合风速随机过程的一般统计特征且具有很好的随机性。最后以通信角钢塔为工程背景,建立有限元模型,采用ANSYS的瞬态动力学分析模块计算了通信角钢塔结构的风振响应,并根据计算结果分析通信角钢塔结构风振系数的取值。
In this paper,according to the characteristics of the wind loads acting on angle-steel communication tower,the fluctuating wind will be considered as a stable Gaussian random process.Based on stochastic theory and the spatial correlation is considered,the time-history curve of fluctuating wind load is simulated using harmonic synthesis method and Matlab language,so the computer simulation of fluctuating wind is realized.The theory and procedure of the simulated time-history curve,could be applied to the simulation of fluctuating wind load of the general high-rise structures,and the general statistical characteristics conformed with the stochastic process of wind speed have a good randomness.Finally an angle-steel communication tower as engineering background,and establish accurate finite element model,then the dynamic characteristics and wind-induced response of the steel tower are calculated using ANSYS transient dynamic analysis modules.Then a research is made on the coefficient value response of wind-induced vibration response of angel-steel communication tower.
出处
《工业建筑》
CSCD
北大核心
2011年第4期119-123,共5页
Industrial Construction
基金
国家自然科学基金项目(50978089
50748029)
湖南省自然科学基金重点项目(09JJ3102)
国家"985"资助项目
关键词
高耸结构
通信角塔
风振响应
时域分析
high-rise structure
angle-steel communication tower
wind-induced vibration response
time domain analysis
