振动信号Fourier分析下高耸结构损伤识别仿真

Damage Identification Simulation of High-Rise StructureB ased on Fourier Analysis of Vibration Signal

针对传统方法中高耸结构损伤识别时出现的识别效率低与识别损伤位置不精准的问题,提出了一种振动信号Fourier分析下高耸结构损伤识别方法。首先,通过震动信号Fouurier判断高耸结构出现损伤的大体位置,然后将信号转换为连续的离散化小波,并构建时间序列模型,利用该模型对所观察的有序随机数据进行分析,得到高耸结构损伤的加速度、位移、与速度信号,之后凭借自由度的粘性阻尼系统,构建伪传递函数,并使用ARX模型对其进行建模,挑选出自由度的相应值作为参考通道,最后构建高耸结构在正常状态下响应的损伤阈值,并将上述得到的信号与损伤阈值对比,进而完成对高耸结构损伤的识别。仿真结果证明,所提方法在高耸结构损伤识别中有着识别效率快和识别损伤位置精准度高的优点。

Aiming at the problems of low identification efficiency and inaccurate identification of damage location of high-rise structures in traditional methods, a damage identification method of high-rise structures based on vibration signal Fourier analysis is proposed. Firstly, the initial location of damage was determined by the vibration signal Fourier, and then the signals were transformed into continuous discrete wavelet. Meanwhile, the time series model was built. The model was used to analyze the ordered random data, so that the acceleration, displacement and velocity signals of the damage in high-rise structure were obtained. After that, the pseudo transfer function was constructed by the viscous damping system based on the degree of freedom. And then, ARX model was adopted for modeling. Moreover, the corresponding values of the degree of freedom were selected as the reference channel. Finally, the damage threshold of high-rise structure in normal state was constructed, and the above signals were compared with the damage threshold, so that the identification for damage in high-rise structure was completed. Simulation results show that the proposed method has the advantages of high efficiency and high accuracy in damage identification of high-rise structure.