Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Investigation of the dynamic behavior of reinforced beams
Submission Author:
Thiago de Paula Sales , SP
Co-Authors:
Lucas Henrique Bastos Oliveira, Vinicius Germanos Cleante, Thiago de Paula Sales, Domingos Rade
Presenter: Lucas Henrique Bastos Oliveira
doi://10.26678/ABCM.COBEM2023.COB2023-1439
Abstract
Reinforced beams have applications in various engineering fields, such as civil, aeronautical, naval, and maintenance engineering. Models based on the finite element method (FEM) are widely used to investigate the dynamic behavior of these structures. However, accurately describing high-frequency phenomena with FEM can demand significant computational effort due to the need for refined meshes. The Spectral Finite Element Method (SFEM) emerges as an alternative to address this issue, allowing the construction of models with few elements that remain highly accurate in high-frequency scenarios. This ongoing work investigates the influence of reinforced layers on the dynamic behavior of a beam with a weakness point at the center. The main objective is to evaluate the influence of the length of the gap and the lengths of the reinforcement layers on the structure’s dynamics, with the aim of assessing the potential of reinforcement layers in enhancing structural integrity and exploring new engineering applications. Using the multi-layer beam theory with the Zig-Zag warping theory, the SFEM is derived and validated with results from the FEMAP software. An SFEM model for reinforced beams with different lengths of reinforced layers and various gap lengths is derived and investigated. The results show that increasing the gap length has a detrimental effect of softening the structure. On the other hand, the use of reinforcement layers improves the structural properties. However, it is found that the length of the reinforcement layers in effective contact with the beam is more relevant to improving the dynamic properties of the structure than the total length of the reinforcement layers.
Keywords
multilayer beam, spectral finite element, Vibration, Numerical simulation
