小波变换在结构损伤识别中的应用研究

针对土木工程结构的复杂性和数据的不完备性，以小波分析为理论基础，结合多尺度分析理论和数值模拟，对结构损伤识别进行了研究。主要分析了结构动力参数在损伤后的变化特征，对单自由度框架的加速度信号进行小波分析，得到结构损伤的时刻；研究了利用空间域信息对结构损伤位置的识别问题，对带裂缝悬臂梁的变形曲线进行小波变换，判定了结构损伤位置。

Study on Application of Wavelet Transforms in Structural Damage Identification

In view of the complexity of civil engineering structures and incompleteness of the data, this paper is based on wavelet analysis, combing multiscale analysis theory with numerical simulation to study on the structural damage identification. The main subjects are as follows： the properties of dynamic parameters are investigated when the damage occurs, the damage time of single-freedom frame structure is achieved through wavelet analysis of the acceleration signal; the identification of structural damage location is also studied with spatial domain information, which determines the structural damage location by wavelet transforms in deformation curves of uniform cantilever beam with cracks.