摘要
基于一钢质天线气动弹性模型风洞试验结果，研究了其风致疲劳，首先，根据当地气象站资料统计的风速风向联合概率分布函数求得天线结构所在位置处的风速风向联合概率分布函数，并以结构假定的疲劳寿命为最大风速重现期来计算每个风向区间要考虑的最大风速，其次，对天线结构的气动弹性模型进行风洞试验，
The paper presents a study of the fatigue damage caused by wind actions of a real steel antenna. Based on the wind data obtained from the local meteorological observatory, the joint probability distribution model of wind speed and corresponding direction is first derived. The maximum wind speed for a given wind direction is determined according to the assumed fatigue life of the structure as the return period. The aeroelastic full antenna model is then tested in a wind tunnel,and the wind induced vi- bration responses are accordingly recorded at different wind speeds and wind directions. The power spectra of the stress responses at critical points are obtained on the basis of the responses. Finally, the accumulated fatigue life is calculated in frequency domain by using equivalent narrow band method. The results indicate the fatigue life of the antenna is close to the designed life of the building.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第7期926-926,共1页
Journal of Tongji University:Natural Science
基金
国家自然科学基金创新群体科学基金资助项目（50321803）
