Beam Model Validation Based on Finite Element Analysis

摘要

The paper present the newest researches performed by the authors, destined to find out the proper beam model, in concordance with its geometrical characteristics. This knowledge is used to choose the adequate relations in the difficult process of damage detection. First, we calculated, for beams with various lengths and cross-section areas the first ten natural frequencies of the weak-axis bending vibration modes, basing on two models which describe the beam's dynamic behavior: the Euler-Bernoulli model and the Share model. Next, using FEM simulations we found out these frequencies for the considered beams. Finally, comparing the natural frequencies obtained analytically and by means of FEM analysis, we found out which theoretical models best fit for the various investigated cases.