基于模型试验与傅里叶变换的结构模态参数识别方法研究

Nowadays, structural health monitoring has became a research focus in the field of civil engineering.The key of structural health monitoring system is how to obtain accurate modal parameters of structure. In this paper a method to identify the modal parameters of structure based on model test and fourier transform is proposed. Structural dynamic response is obtained by model test and natural frequencies are calculated by fourier transform. Finally, comparing natural frequencies between model test and fourier transform, the real structural natural frequencies are confirmed. The result of numerical simulation shows that the proposed method for identification structural modal parameters was feasible and effective, and can be applied to structural health monitoring system.