LOCALIZATION OF DAMAGE IN CANTILEVER BEAMS USING
THE RELATIVE SHIFT IN NATURAL FREQUENCIES
This paper presents a method to locate the damages in cantilever
beams based on relative shift in natural frequencies. This method takes in to
account the particular manner in which the natural frequencies of the first then
modes change due to the occurrence of damage. The measured frequencies
changes are a compared with values contained in a databases, determined on
models using the finite element method. For these databases we consider a
large number of damages locations. By comparing the changes in frequencies
obtained trough measurements with those determined on models, for the first
ten vibration modes, it was possible to locate damages with high accuracy.
Keywords: vibration, bar mixer, frequencies, detecting defects
Cuvinte cheie: vibraţii, bară încastrată, frecvenţe proprii, detectarea
defectelor
