Influência da temperatura na localização de danos estruturais via método do erro residual.

Abstract

Damage detection is extremely important when it comes to extend the life of the structure, because conducting an inspection provides answers to structural integrity, guiding decisions about the need for interventions and / or repairs. In this context, the Residual Error Method - MER (used in this work) presents itself as a method capable of locating the damage through alterations, produced by the damage, in the dynamic characteristics of the structure. Although modal parameters are sensitive to structural damage, they also have sensitivity to environmental variables such as temperature, and this variation, caused by these factors, may influence the performance of the method. Therefore, this work sought to study this influence through the modeling of intact and damaged beams, using the Ansys Student software for modeling, in scenarios with and without temperature variation, applying the MER through Matlab. The results showed that in scenarios without temperature variation the method was able to detect the damage, while in scenarios that considered the influence of this parameter, it was no longer possible to detect the damage, just visualize the region where it is located.