Abstract
This paper presents a numerical procedure to compute the robustness function of large finite element models with parameter uncertainties based on convex models and component mode synthesis methods (CMS). For an optimal reduction of the size of the model the CMS with reduction of interface dof is used. This coupling methodological approach is used on one hand to reduce the size of the model and on the other hand to analyze the structures where the data on the uncertainties are limited enough. Robustness function is determined and the dynamic analysis of large and composed structures is investigated. Numerical results illustrating the efficiency of the proposed coupled procedures for large FE models with random parameters are presented.