摘要
根据小波奇异性检测理论,以应变能的损伤信号为结构损伤指标,分别以悬臂梁结构、平面桁架结构和空间网架结构为例进行数值模拟,将原始损伤信号和经过小波变换后的损伤信号进行对比,结果证明采用该方法不但对单一损伤而且对多损伤均能有效地识别出结构的损伤位置,表明了该方法的可靠性和实用性。
The inevitable damage, aging of steel structures in use process, needs detecting damage location. The wavelet analysis technique provides new ideas and methods for the steel structural damage detection. Based on the theory of wavelet singularity detection, with the injury signal of strain energy as structural damage index, and cantilever beam structure, plane truss structure and spatial truss as examples for numerical simulation, the original damage signal and the damage signal after wavelet transformation is compared. The calculational result shows that the present method as a reliable and practical way can be adopted to detect the single and several locations of damage in structures.
出处
《河北科技大学学报》
CAS
北大核心
2010年第2期151-157,共7页
Journal of Hebei University of Science and Technology
关键词
损伤检测
损伤定位
小波奇异性
应变能
小波变换
damage detection
damage location
wavelet singularity
strain energy
wavelet transformation
