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Abstract
Application of structural optimization is limited by designers' concerns about the safety of erected structures that were designed optimally. This is because of differences between assumed, and real structural dimensions, caused by manufacturing tolerances. The paper presents an approach allowing to consider the influence of tolerances in a standard algorithm for structural optimization. Without losing generality, the paper deals with statics of a truss. However the idea presented here can be easily extended to other kinds of structures like frames and composites. The state equations in the problem are solved for average values of cross section areas. The tolerances are introduced into constraints imposed on stresses and displacements. The limit values of constraints are diminished by some products of sensitivities and tolerances. The paper is illustrated by an example of a ten bar structure commonly used as a bench mark problem in structural optimization.