Modelisation of modulated vibration modes of repetitive structures

摘要

In this work, we deal with the modulated vibration modes of large repetitive structures. Based on a multiple scale analysis, an amplitude equation is presented, that is able to account for this class of modes. This amplitude equation involves a real coefficient that can be computed from the finite element resolution of periodic problems defined on a few basic cells. In this way, one can avoid the discretization of the whole structure.