Modélisation Numérique du Vibration des Arbres Tournants

Abstract

Technological progress continues to demand more efficient systems. For rotating machines, the ideal goal is high power and extremely high speed However, despite advancements in design, vibration issues related to major components such as shafts and rotors are still a phenomenon worthy of attention. The latter is caused by inevitable processing and assembly failures, which limit the performance of the machine by affecting the operation and reliability of the machine. They can cause serious damage or bring about its ruin. The modeling was done by the finite element method using the ANSYS calculation code to determine the frequencies, the modal deformations, the critical speeds of the rotor and to calculate the stresses acting on the rotor for the different modes. The work presented in this thesis deals with a real problem concerning the analysis of the dynamic vibratory behavior of two models rotating shaft with two bearings and rotating shaft with two bearings and disc with unbalance.