Model Mixing with Frequency Based Substructuring: 4 DoF Half-Vehicle Analysis

Resumo

This paper reviews the system equivalent model mixing (SEMM) technique. This method is applied to obtain hybrid dynamic models, primarily by using a numerical model in order to expand the degree of freedom space of an experimental model. The formulation of this method is based on coupling and decoupling of substruc-tures, by means of the Lagrange multiplier frequency-based substructuring (LM-FBS) technique. Therefore, the SEMM technique will be applied in a half-vehicle model, where the dynamics of a parent model will be updated with the dynamics of an overlay model of an equivalent system, but with lower density of degrees of freedom (DoFs). This procedure aims to create a hybrid model, which expands the dynamics of the overlay model to the denser DoFs of the parent model. The influence of the interface size, damping and signal noise on the final hybrid model will be evaluated in this paper.