Vibro-acoustic modeling

Respirer un air sain chez soi ou au travail, nécessite d'aérer efficacement les pièces. Les entrées d'air de fenêtres sont à ce titre largement utilisées. Néanmoins, ces menuiseries amoindrissent l'étanchéité sonore des façades puisqu'elles constituent un chemin privilégié pour le passage du son de l'extérieur vers l'intérieur des bâtis...

Breathing healthy air at home requires an efficient ventilation which is generally achieved by mechanically controlled ventilation systems. However, the installation of air inlets, at the top of windows, reduces sound insulation...

This work focuses on the numerical prediction of the sound transmission of wooden windows in the low frequency range. In this context, the finite element method is used to solve the multiphysics problem...

The acoustic performances of building elements such as windows are carried out in laboratory according to standards. In addition to the high cost of the experimental tests, the measurements at low frequencies face some difficulties such as the lack of reproducibility, the rooms’ modal behaviour effect and the diffuseness of the acoustic field...

The acoustic performances of building elements such as windows are performed in laboratory according to standards. In addition to the high cost of the experimental tests, the measurements at low frequencies, face some difficulties such as the lack of reproducibility, the diffuseness of the acoustic field and the effect of the modal behaviour of the rooms...

Double-glazing is widely used in constructions due of their sound insulation performance. According to the standards, the prediction of their acoustic performances is carried out in laboratory using two reverberant rooms. It's well known that, in the low frequency range below the Schroeder frequency, the presence of these rooms can affect the measurements due to their modal behavior...

Compared to numerous theoretical studies, the problem of experimentally realizing supported conditions on plane panels has received very little attention. A technique to setup a simply supported rectangular plane panel for laboratory vibroacoustic tests is described...

Measuring the vibro-acoustic response of structures subjected to a turbulent boundary layer (TBL) excitation in operating conditions remains an open issue for experimenters. Generally, in situ measurements, e.g. flight tests, underwater measurements and wind tunnel measurements are carried out, although they require expensive facilities. As an alternative to in situ measurements, experimental simulations in a laboratory environment have been developed...

The vibro-acoustic behavior of elastic structures coupled with cavities filled with a heavy fluid can be modeled by using the Finite Element Method. In order to reduce computing time, the Patch Transfer Function (PTF) approach is used to partition the global problem into different sub-problems...

Of particular interest is the experimental feasibility of replacing wind tunnel measurements with a substitute experiment to simulate Turbulent Boundary Layer (TBL) induced vibrations. This paper describes the development of an experimental procedure to address this issue...