A modal substructuring method for non-conformal mesh. Application to an electronic board
Résumé
This paper deals with the coupling of modal models computed independently from each other (non-conformal substructuring). The proposed approach is inspired by the mortar methods initially written for finite elements, and here adapted to modal formalism. Mortar methods combine efficiently with the modal method described hereafter as Steklov modes introduced in this study dissociate volume and surface contributions. A realistic example illustrates the method: a library of electronic components reduced models is built, then used to create two electronic cards. Results meet high expectations: the substructured reduced model is 2500 times faster to solve than a finite elements one, while keeping a precision below 1∘C on the critical parameters.