摘要
空间结构气动弹性模型的设计和制作是非常困难的。本文根据一大型体育场环状挑篷的结构和风振响应的特点,合理简化相似准则,成功设计和制作了这一复杂结构的气动弹性模型,并在大型边界层风洞中模拟的B类风场、36个风向角下进行了试验。通过对结构典型测点加速度响应谱的特征分析以及对风向和风速对结构加速度和位移响应的影响的分析得到:看台以上挑篷中部的振动最强;风向对挑篷不同部分的振动幅值和参与振型有很大影响;挑篷的风致振动响应由多模态贡献。
It is very difficult to design and manufacture aeroelastic models of space structures. In this paper, an aeroelastic model of an annular cantilevered roof of a stadium was successfully designed and manufactured on proper simplification of the similarity rules and based on the characteristics of the structure and wind induced vibration responses of such structures. The model was tested in a wind tunnel under 36 wind directions and the simulated wind field of terrain category B. The effects of wind direction and wind speed on the structural acceleration and displacement responses were discussed and the characteristics of power spectra of acceleration responses of some typical measurement points were investigated. The test results indicated that the middle part of the roof over the stands vibrates most seriously; wind direction has great effects on the vibration amplitudes of different parts of the cantilevered structure and participating modes; and wind-induced responses of the cantilevered canopy are contributed by the coupling vibration of multi-modes.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2005年第1期60-64,107,共6页
Journal of Building Structures
基金
国家创新研究群体科学基金(50321003)
教育部高等学校骨干教师资助计划联合资助。
