Validação de uma bancada experimental com ênfase em fenômenos de dinâmica de rotores.

Abstract

The dynamic behavior of rotating mechanical systems like shaft-disc-bearing systems is an object of research in mechanical engineering since the early twentieth century. The approach taken in this dissertation makes use of finite element analysis. The experimental rig mentioned in this work consists of a horizontal rotor driven by an electric motor and a frequency inverter, that aims to simulate rotating machinery providing a learning environment in rotor dynamics phenomena that can occur in actual machines. The text was divided in two steps. The first step of this study is to identify the first six natural frequencies of rigid body and modes vibration of the non-rotating part of the machine. The second step focused on the rotor, modeled through a software developed specifically for the analysis of rotors, where the critical frequencies can be checked as well the modes shapes due to the rotation and can be examined the Campbell Diagram for analysis of other effects from the gyroscopic effect can also be generated. Therefore, simulation results were compared with the data processing collected in measurements performed in the experimental rig, where it was possible to identify the main phenomena presented by the rig.