基于多尺度小波分析的在线结构损伤诊断方法

将多尺度小波分析引入到在线结构损伤诊断上来,充分利用其在处理非稳态信号上的优势,从在线监测过程中得到的时程曲线中提取结构的损伤信息。通过编制刚度随时间变化的损伤模拟程序,得到损伤结构的时程反应,提出了相应的损伤指标,从而做到对于结构损伤的确认以及时间和空间上的定位,最后通过数值算例验证了该方法在处理在线结构损伤诊断上的可行性。

Real-time Structural Damage Diagnosis Based On Multi-scale Wavelet Analysis

A new damage diagnosis method based on multi-scale wavelet analysis is proposed, The multi-scale wavelet analysis, which has the superiority on the processing unstable signal, gains the damage information from the acceleration responae of the real-time structure. A damage index is presented that based on the multi-scale wavelet analysis of the real-time structural response which is gained from the simulating of time-dependent damage, so we can identify and localize the damage. At last, a 10-storey shear-beam building numerical example is presented to prove this method. Results show the index can be used to identify and localize both single damage and multiple damages which happen in the real-time monitoring process of the structure.