Identificação das frequências de vibração de modelos estruturais reticulados, por meio de análise experimental, numérica e analítica

Abstract

In the last decades, structural engineering has recorded several cases of problems in structures under the action of dynamic loading. One of these problems is the vibration of structures, which can be measured through the natural frequencies of them. These indicate the rate of free oscillation of the structure, after ceasing the force that caused its movement. In similar words, it represents how much the structure vibrates when there is no force applied on it, whose most common unit is Hertz. A structure has several natural frequencies because it has several modes of vibration. The objective of the present work is to compare the results obtained by the analytical, experimental and numerical method of the values of these frequencies of a reticulated structure. It also presents the purpose of showing how an axial load of compression (protension) can affect these values. The experimental model is a free-free beam.