Optimization of thin-walled beam structures: Monolithic versus staggered solution schemes

This contribution compares the performance of a monolithic and two staggered numerical update schemes for coupled shape topology optimization method thin-walled beam structures. In order to limit computational time method, structures are modeled as 2.5D configurations. this approach, 1D elements used simulate response in longitudinal direction, while cross-sectional properties calculated from additional 2D finite element analyses. The sensitivities with respect design variables derived closed form take advantage computationally efficient, gradient-based algorithm. examples concern basic circular square cantilever structures, well more complex, non-prismatic structure representative rotor blade horizontal-axis wind turbine. For each example solution computed by compared, which provides clear insight into efficiency procedure uniqueness result. Although three different cases examined result comparable optimized concepts, specific minimal compliance value found turn out be rather sensitive algorithmic details scheme applied. Since typically navigates larger space than schemes, most it lowest structural compliance. case whereby (virtually) has no influence on final, configuration, may relate local minimum that is less optimal compared scheme.