Parametric optimization of bar structures with discrete and continuous design variables using improved gradient projection method

The paper considers a parametric optimization problem for the bar structures formulated as nonlinear programming task, where purpose function and non-linear constraints of mathematical model are continuously differentiable functions design variables. method objective gradient projection onto active surface with simultaneous correction violations has been used to solve problem. A discretization technique variables that should vary discretely proposed. optimal solution obtained in continuous space is performed by purposefully selecting discrete points around point optimum. comparison results presented demonstrates improved together proposed converges better solutions comparing meta-heuristic algorithms.