COORDENADORIA DE ENGENHARIA MECÂNICA (original) (raw)

The present work consists in the analysis of the structural behavior and dimensioning of a Gantry Crane, observing stresses and strains spectrum through the structure, which are caused by the several loads applied to the structure. For this study, the structural design of the gantry crane is first carried out in an analytical approach, using bar elements in the construction of a three-dimensional gantry. Applied the various loads present for the presented case, the minimum characteristics necessary for the structure construction are obtained using strength of materials concepts. Next, each profile section of the various elements constituting the structure are defined. Once the structure is dimensioned, present tensions and deformations are calculated, and their values verified having NBR 8400 (1984) [4] as calculation criterion. Once the analytical approach phase is completed, the 3D modeling of the CAD software structure is carried out for subsequent export to the CAE software, where the boundary conditions of the problem, such as loads and restrictions to displacement will be applied. Completed the CAE software processing, which uses the Finite Element Method in the mathematical solution of the various displacements of the analyzed mesh, values of stresses and deformations in the presented structure are interpolated. Finally, acquired the values of stresses and strains, both analytical and finite element method approaches are compared and weighed. In this way, it can be verified that although both methods allow the verification of the maximum stresses in the structure, only the finite element method allows the visualization of the stress distribution along the structure, as well as the stress concentration points.