Abstract
The dynamic behavior of large complex structures is often achieved by substructuring methods where the substructures are modeled separately. One of advantages of these methods is that one component may be changed without remodeling the others. This is particularly useful when components are designed and analyzed by different organizations.
Althougth these methods use a variety of reduction techniques to couple the substructure models, the size of the final condensed system remains important due to large number of the junction degrees of freedom (Abv: dof) required for assembly.
In this paper, we propose a method using a modal projection on the Ritz basis which, when correctly chosen, reduces the number of these dof before the assembly of substructures. This method is applied to certain substructuring methods: dynamic condensation, modal synthesis using free or constrained interfaces.
