Conference_programme: 17.6 - Predicting vibration / impact / structure-borne sound in buildings
Lecture: Estimation of coupling power proportionality for the SEA of highly dissipative dynamical system in medium-high frequency domain
Author(s): Guo Yifu, Desceliers Christophe, Coguenanff Corentin, Guigou-Carter Catherine
Summary:
Until nowadays, an energetic approach called Statistical Energy Analysis (SEA) is widely used in acoustical prediction. However, this method depends a lot on important coefficients such as Coupling Power Proportionality (CPP), which is usually difficult to be analytically identified. For decades, people have worked on the extensions or some alternative models of SEA, and some of them are trying to give an analytical expression of CPP. Nevertheless, it is always a challenge to deal with highly dissipative materials. In this paper, based on SEA principles, we propose a quasi-analytical solution of CPP, which circumvents the limitation of light damping assumption. With this energetic method, the Sound Transmission Loss (STL) of a dynamical multilayer system can be predicted correctly and rapidly, regardless of the dissipation of each layer. The numerical result of this proposed method is compared with direct analytical methods and an alternative model of SEA for validating.
Corresponding author
Name: Mr Yifu GUO
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: France
