EFFECTIVE TECHNIQUE FOR STRUCTURES DAMAGE DETECTION BASED ON THE STRUCTURAL FREQUENCY MAPS

This research studies a novel damage detection framework for beam structure systems using displacement sensors.First, a finite element model is established under the impact load.Based on this model, an accumulative damage model is introduced to model the beam damage, and the damage case is considered.Both static and transient displacement are collected from the beam sensors installing a long beam structure.A system transfer function (TF) is proposed and applied to the "open loop" beam system.Results show these approaches perform great promises when damage evolves in beam structure.