【作者】 张令弥； 中村辛雄； 吉田昭仁；

【Author】 ZHANG Ling-mi, TAMURA, YUKIO( Institute of Vibration Engineering, Nanjing University of Aeronautics & Astronautics,Nanjing 210016, China Dept. of Architecture, Tokyo Politechnic University, Tokyo, Japan)

【机构】 南京航空航天大学振动工程研究所； 东京工艺大学建筑系；

【摘要】 本文利用两座典型建筑结构一中高层新结构大楼和大型屋顶平面结构,对基于环境激励(Ambient excitation)的试验建模技术进行了应用研究。首先介绍了试验模型设计,及在现场测量环境激励的响应。然后采用新发展的频率空间域方法(FSDD)进行模态识别。分别在0～6.5Hz和0～4.5Hz频率范围识别出9阶(大楼)和16阶(屋顶结构)模态频率和振型。采用频率空间域方法以及基于Morlet连续小波变换的时频域方法来识别两种结构的阻尼特性,得到满意的结果。所建试验模型已成功应用于CFT大楼的有限元动态模型修正。所研发的试验建模技术可望在结构响应预报,健康监测和振动控制中发挥重要作用。更多还原

【Abstract】 Application study of experimental modeling based on ambient response measurement is presented. Experiment model and field test of a middle-rise building and a large-size roof structure are described, followed by operational modal identification. Total 9 and 16 modes of the two structures have been accurately identified via a newly developed Frequency-Spatial Domain Decomposition (FSDD) technique. Damping characteristics are then estimated employing FSDD and Time-Frequency Analysis method based on Morlet Wavelet Transform. The identified modal frequencies and mode shapes of the CFT building has successfully been applied to Finite Element Model Tuning. The results of this study show promise of the experimental modeling in dynamic response prediction, structural vibration control and structural health monitoring.更多还原