Optimization of materially nonlinear trusses subjected to dynamic loads

Resumo

The structural optimization of trusses has been extensively studied over the past few decades. However, investigations incorporating material nonlinearity are still relatively scarce. The objective of this study is to propose a formulation for optimizing spatial truss structures, considering the material nonlinearity of the structure under dynamic loading. To address this problem, the Particle Swarm Algorithm (PSO) integrated into the Ansys program will be utilized for nonlinear dynamic structural analysis. To validate the optimization approach, a problem from the literature, considering material nonlinearity, will be analyzed. Additionally, will be compared the results obtained from the structural optimization considering and neglecting the material nonlinearity. This comparison aims to assess the real impact of material nonlinearity on optimization results.