Advances in Complex Envelope Vectorization: industrial applications and transient dynamics

In the context of mid- and high-frequency problems in acoustics and vibrations, the modelling of complex systems generates several difficulties, partially related to the large number of degrees of freedom in the discretised model. That makes the problem computationally heavy and very sensitive also to uncertainties in the data. For this reason, in the past decade, a systematic effort was produced from academic and industrial groups to introduce new methods to deal with mid-and high- frequency problems. Recently several European project have been devoted to this subject and, among them, Mid-Frequency. In this frame, this paper reports significant results in the application of a relatively new method called CEV -Complex Envelope Vectorization, able to solve high-frequency vibro-acoustic coupled problems through the introduction of a suitable variable transformation. The method has been the subject of several prior investigations by the authors in the past years and in the present paper it is applied to real cases met in design of car acoustics. The results are indeed very encouraging and give a new horizon to the application of CEV.