Análise estrutural e otimização de um pórtico

Abstract

The use of CAE (Computer Aided Engineering) tools, which involves optimizations and finite element analysis, became in the past few years a common practice during the steps of a project. It is due to the savings made by this procedure and the increase of the reliability through simulations. In this context, this study aims the application of optimizations methods and the structural analysis in order to solve a real engineering case, which consists of a structural verification of a gantry followed by the application of optimization methods in an attempt to propose a new lighter structure. Therefore, the static loadings are considered, as well as the self-weight of the structure and external loadings, besides the load exercised by the wind action, which is measured according to NBR 6123. As result of the simulations, it is obtained a new structure, with a different layout, however, with a mechanical behavior still acceptable, keeping the project security. In order to achieve these goals, topology and sizing optimization methods are used through the commercial software Hyperworks. Other important aspects considered are the manufacturing factors, whereas for a manufacturing of the structure there is a certain range of values for the dimensions of the raw materials, for example the thickness of steel plates. Thus, at the end of the optimization process the obtained layout it’s modeled in CAD (Computer Aided Design) considering the commercial values, and then, it's realized a structural analysis for validation. In the end, it was observed a reduction of 54.59% in the total mass of the structure, compared to the original structure, respecting the design criteria.