TOPOLOGICAL OPTIMIZATION OF PLATE AND SHELL STRUCTURE WITH STRESS CONSTRAINTS

ICM method is applied to slove topological optimization of plate and shell structure with stress constraints. An approximately explicit topological ICM optimization model of plate and shell structure with each design variable controlling multiple elements is established to minimize the weight with stress constraints. Stress constraints are transformed into structural distortional energy constraints in terms of the Misses strength theory which reduces the number of the stress constraints. The model is solved by SQP (sequential quadratic programming) algorithm using exact dual mapping. MSC/Patran & Nastran software is taken as a secondary development platform. The algorithm in this paper is implemented on by PCL language. Examples for the design variables equal to the number of cells were calculated, indicating that the method is effective and feasible.