Abstract
Robust multi-level and multi-objective optimization of complex mechanical structures. This paper presents a. new approach of robust multi-objective optimization and multilevel for design of complex mechanical structures. This optimization is on two levels: system and elements. The robust multi-objective problem on system-level to be solved is with four cost functions: on the one hand the minimization of the global mass and displacement in a fixed point of mechanical structure to be studied, and on the other hand the maximization of the robustness respectively of the mass and displacement whereas the robust multi-objective problem on the element-level is with two cost functions: minimization of the element mass and maximization of its robustness. Contrary to the existing formulations, this new approach takes into account uncertainties on the design parameters on the system-level and on the element-level. Moreover, it answers the task sharing commonly used in industry field.