A new structural damage detection index based on analyzing vibration modes by the wavelet transform

摘要

In this note, a new wavelet-based damage detection method that needs only damaged vibration modes has been proposed. The method is based on extracting a suitable AF by the DWT decomposition of DM, and employing it as reference data. It was shown that the AF extracted at suitable DL using wavelet with high NVM may be well-correlated with UM. Therefore, it can be employed as reference. Numerical applications illustrated that this approach produces reliable results.