Open AccessLocalization of structural damage based on its dynamic analysis
Author(s) -
G Solon Zenkov
Publication year - 2019
Publication title -
trudy krylovskogo gosudarstvennogo naučnogo centra
Language(s) - English
Resource type - Journals
eISSN - 2618-8244
pISSN - 2542-2324
DOI - 10.24937/2542-2324-2019-1-s-i-170-176
Subject(s) - finite element method , structural engineering , curvature , vibration , structural integrity , necking , computer science , materials science , mathematics , engineering , acoustics , physics , composite material , geometry
This paper gives the results of analytical and experimental data on localization of structural damage, obtained through comparison of vibration modes for intact and damaged structure. The paper studies a standard dog-bone sample used for highcyclefatigue tests, the analysis being performed for its finite-element model. Necking damage of the sample was simulated by step-by-step elimination of elements from the model. Physical tests were performed as per the same approach. This paper studies the following damage localization methods: direct method of shape variation; shape curvature method and damage index method. The analysis of vibration shapes performed as per various approaches yielded damage locations and made it possible to identify the most accurate of above-mentioned methods.