About the Neutral Axis Distortion due to Cracks and its Influence upon the Beams Natural Frequencies
Journal Title: Romanian Journal of Acoustics and Vibration - Year 2015, Vol 12, Issue 1
Abstract
In this paper the distortion of the neutral axis of cantilever beams due to damage is analyzed via numerical simulations. Both static and dynamic behaviors are considered, aiming to prove that the damage affects all bending vibration modes in a similar manner. Thus, the beam deflection under its own mass is identified for the healthy state and for a series of imagined damage scenarios. Afterwards, the natural frequencies are numerically evaluated and the correspondence between the deflection increase as a measure of energy lost and the frequency shifts is found. It was also demonstrated that the local value of the neutral axis of damaged beams is not anymore an indicator of the locally stored energy.
Authors and Affiliations
Ionica NEGRU, Zeno PRAISACH, Gilbert GILLICH, Ovidiu VASILE
Keywords
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