Author(s)

M. Skrinar

Abstract

During the past years, a great deal of time and efforts have been spent in analysing the changes of eigenpairs of the structure due to the reduction of stiffness and especially of cracks as well. These investigations are further used to identify the crack location and then its magnitude. The whole attention is focused on cracks and similar types of damage, neglecting the fact that the eigenpairs changes can be also due to other causes, for example by changes of the mass of the structure. The paper presents the comparison of eigenvectors changes due to two types of structure modifications: stiffness and mass variations. The study covers both the discrete approach using finite element method, and also continuous approach. It is evident from both cases that eigenvectors change for different struct

Keywords