Comparision of the teoretical and experimental vibrations modes in beams with cracks

Resumo

The objective of this work is to describe the modeling to concentrated parameters, the experimental implementation and the study of the dynamics that allow the identification and estimate the position of crack in beams, trough the analysis of the natural manners of vibrations. The natural manners of experimental vibration are obtained in an experimental apparatus formed by: a device for excitement of the structure, a transmuted and a spectrum analyzer to obtain answers from the information in frequency. The dynamic modeling and the experimental modal analysis are applied in the control of beams that posses split or crack that permit an estimate of an answer that the structure will give to the effect of the loads.