Multi-objective optimization of wind-excited structures

A procedure for the optimization of wind-excited structures is proposed. It is based on the simulated annealing algorithm combined with the dynamic analysis of the response either in the frequency or in the time domain. When the step-by-step dynamic analysis is used, it can handle the case of flexible structures, like masts and lattice towers, whose geometric non-linear effects cannot be neglected. The procedure allows for multiple variables and objectives. The proposed method is used to optimize the configuration of a cable-stayed mast subjected to turbulent wind loading. The results showed that the algorithm is reasonably independent of the first guess configuration and is effective in avoiding local minima. Its wide field of applicability and ease of implementation make the proposed algorithm a powerful design tool for structural engineers.