Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Test bench for experimental study of the geometric stiffness in vibration of beams as support of rotating machines
Submission Author:
Alexandre de Macêdo Wahrhaftig , BA , Brazil
Co-Authors:
Alexandre de Macêdo Wahrhaftig, Reyolando Brasil, Gabriela Silva Correia Cordeiro
Presenter: Alexandre de Macêdo Wahrhaftig
doi://10.26678/ABCM.COBEM2017.COB17-2821
Abstract
In this research paper, we intend to describe a test of bench in order to study the effects of geometric nonlinearities on vibrations of rotating machinery support structures. Dynamic characteristics of structures depend on their stiffness and mass. With these, we determine their natural frequencies and modes of free vibrations. Nevertheless, the initial stiffness of a structure, computed in its unloaded state, are affected by the applied forces, the so-called geometric stiffness. Compressive forces usually reduce the stiffness and the frequencies and may lead to buckling, for zero frequencies. Currently, structural engineering is striving to produce more slender structures, with less material consumption, which has led to the construction economics and with flexible parts.
Keywords
Engine Base, beam, resonance, geometric stiffness
