Identificação de dano estrutural em um modelo de barra e viga pelo método de elementos espectrais

Abstract

One of the great benefits of the development of the engineering area and new technologies, is that the safety of people also develops and is taken as indispensable in the routine. Structural Health Monitoring, in addition to being a system of great advancement in engineering, allows us to make planned and anticipated decisions, acting always in favor of safety. In order to continue overcoming the limitations in the analysis structural dynamics, methods were developed based on the Finite Element Method, since it presents imprecision in high frequency systems. With that, the Spectral Element Method is promising as it presents advantages during the solving structural problems. In this present work, will be approachead the Finite Element Method and Spectral Element Method, in the concept of structural health monitoring through the variation of the system’s natural frequencies. The studies took place in a comparative way between the methods presented, implementing them in a bar and beam model. First, it was necessary to study the equations that govern the method, so that it could then elaborate a script to obtain the spectral matrix, that it becomes possible to obtain the Frequency Response Functions (FRF). The study of FRFs proves to be important in structural health monitoring, as the variation in natural frequencies can signal the presence of cracks and damage to the structure.