DAMAGE IDENTIFICATION IN PLATE-TYPE STRUCTURES USING 2-D SPATIAL WAVELET TRANSFORM AND FLEXIBILITY-BASED METHODS

摘要

Wavelet-based damage identification using vibration measurements has received significant attention over the past two decades and wavelet transforms, as signal processing techniques, have become a practical and useful methodology in the field of damage identification. In this work, generalized flexibility matrix (GFM) and uniform load surface (ULS) in conjunction with a 2-D discrete wavelet transform are used to find damage locations in plate-type structures. In order to evaluate these methods, a finite element (FE) model of a plate is used and the effects of number of involved modes, damage location, damage severity, and different boundary conditions are studied.