Research of the Checkerboard Pattern Suppression Method in Structural Topological Optimization.

Aimed at the calculation of elements' weight coefficients in the checkerboard pattern filtering technique, a previous checkerboard pattern suppression method was improved, and a more generalized weight coefficient formula with more specific physical meanings was proposed. The topological optimization model, in which the material elasto-plastic deformation was considered, was established under stress constraint conditions, and the improved checkerboard pattern suppression method was employed in the structural topological optimization process with the ESO method. Two numerical examples were implemented. The results show that the improved checkerboard pattern suppression method has better suppression effects than the previous one, and is applicable to the topological optimization of not only linear-material structures, but also nonlinear-material structures. [ABSTRACT FROM AUTHOR]