Estudo de Sensibilidade do Algoritmo de Colônia de Vagalumes para um Problema de Engenharia Envolvendo Dimensionamento de Treliças

ABSTRACT

The truss is a rigid triangular structure, with resistance to normal load, and can be used on roofs, mezzanines, energy towers, telecommunications and bridges. Soon it is possible to state that this structural system has great relevance in the structural engineering scenario. This research uses a probabilistic method of global optimization based on collective intelligence or swarm intelligence, with promising applications in several fields of applied sciences, the Firefly Algorithm (FA), to determine the minimum weight of a benchmark truss. A sensitivity analysis was carried out with the parameters of the algorithm, such as the population (Npop), the number of iterations (Ngen), randomness parameter α, attractiveness factor β , and light absorption parameter (γ). The truss used in the tests was a benchmark structure with 10 bars, and this was optimized, obtaining a minimum weight value of around 2284 kg. When compared to other works in the literature, such value shows the effectiveness of the method adopted in this work. The software used for the implementations and simulation of the trusses was MATLAB^®.

Keywords:
optimization; trusses; steel structures; firefly algorithm