Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
DYNAMIC BEHAVIOR OF AXIALLY MOVING SYSTEMS WITH ELASTIC SUPPORTS
Submission Author:
Gabriella Nehemy , SP , Brazil
Co-Authors:
Gabriella Nehemy, Paulo José Paupitz Gonçalves, EDSON CAPELLO SOUSA
Presenter: Gabriella Nehemy
doi://10.26678/ABCM.COBEM2019.COB2019-0309
Abstract
Axially moving systems are present in a wide range of engineering devices such as transmission belts, variable transmission systems, band saw, cold drawing process, paper machines. However, above a certain critical speed, these systems can experience strong vibration and dynamic instabilities, leading to structural failure. In the literature, there are studies of such systems considering both the elastic and rigid supports as boundary conditions. It is known that this elastic foundation can change the behavior of axially moving structures. In this context, the stability and dynamic responses of these two types of systems have been widely studied to guarantee the success of the projects. Several methods were proposed for the structural analysis and among them, the spectral element method is very interesting in the dynamic analysis of structures. This work developed axially moving strings models using the spectral element method and analyzed the effects of the moving speed and the elastic foundation on the transversal vibrations. The moving speed considerably affects the natural frequency of the structures. The elastic foundation affects the natural frequencies and, together with the moving speed, attach a damping effect to the frequency response function.
Keywords
axially moving systems, elastic foundation, spectral element
