五层房屋缩尺模型实验模态分析

The Experimental Modal Analysis of Five-Storey Building Scale Model

摘要: 通过锤击实验，对五层房屋缩尺模型进行了实验模态分析，利用数学软件MATLAB对所得数据进行相关处理得到结构模型的频响函数，运用模态参数识别频域法的相关原理对得到的频响函数进行相关模态参数的识别，获得了结构模型弱轴水平方向的固有频率和模态振型，并将所得结果与ANSYS有限元分析结果进行比较，检验了实验结果的准确性和有效性。

Abstract: The experimental modal analysis of a five-storey building scale model is performed with the use of hammer test in this paper. After obtaining vibration signal data and processing them by means of mathematical software MATLAB, the FRF (Frequency Response Function) of the model is achieved. Then, the FRF is studied further to obtain the model’s horizontal modal parameters such as modal frequency and modal shape, using relevant modal parameter estimation methods in frequency domain. Furthermore, the results’ validity is examined and testified by means of the comparison between test’s results and that of ANSYS.