摘要
采用AR模型和小波分析模型对乙烯生产塔架进行空间相关性风场模拟,并讨论了风振计算时间的选取问题.进而,利用有限元软件对塔架进行风振响应分析,获得了不同高度处各节点的位移响应和加速度响应,计算出位移风振系数,并与《建筑结构荷载规范》及《高耸结构设计规范》的计算结果进行对比,结果表明两种规范的计算结果偏小.同时统计了加速度放大系数的取值,进一步讨论了阻尼比及附加质量对位移风振系数和加速度放大系数的影响.
The spatial correlation wind field of ethylene production tower is simulated by AR model and wavelet analysis model, and the selection problem of computing time of wind-induced vibration is discussed. Then, wind-induced dynamic analysis of tower is taken by the finite element software. Nodal displacement response and acceleration response of nodes with different height are obtained. Furthermore, the wind-induced vibration coefficient of displacement of tower is calculated and compared with load code for the design of building structures and code for design of tall-slender structures. The calculation results of two codes are relatively small. The magnifying coefficient of acceleration is also calculated. The influence of damping ratio and additional quality on wind-induced vibration coefficient of displacement and magnifying of acceleration is finally discussed.
出处
《空间结构》
CSCD
北大核心
2012年第3期28-34,共7页
Spatial Structures
基金
国家自然科学基金资助项目(5117808)
黑龙江省教育厅重点资助项目(125112004)
关键词
乙烯生产塔架
风振响应分析
计算时间
风振系数
ethylene production tower
wind-induced dynamic analysis
computing time
wind-induced vibration coefficient
