Application of Superposition Principle to Detect Damages in Beams by using Natural Frequencies
Journal Title: Romanian Journal of Acoustics and Vibration - Year 2012, Vol 9, Issue 1
Abstract
This paper presents the researches made by the authors in order to detect damages in beams using natural frequencies by applying the superposition principle. The chosen type of beam was the cantilever one, for which a database containing the first ten natural frequencies in undamaged state was realized. The database was completed with the first ten natural frequencies of the beam with one damage in 200 points and 3 levels of severity. The resulted frequency shift for each place of the damage was used to create a pattern, in order to describe the behavior of the damaged beam. The natural frequencies were determined using the Finite Element Method (FEM). Finally, two damages on the beam were modeled and analyzed and the superposition principle was applied and compared with the analyzed cases for the beam with one damage.
Authors and Affiliations
Zeno-Iosif PRAISACH, Ionica NEGRU, Gilbert-Rainer GILLICH
Keywords
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