M\'ethode de calcul du rayonnement acoustique de structures complexes

TL;DR

This paper introduces an innovative hybrid computational method combining Finite Element and Boundary Element techniques to accurately predict acoustic radiation from complex structures, enhancing noise prediction in automotive design.

Contribution

The paper presents a new approach, the SDM, that optimally combines FEM and BEM, and introduces a novel finite element-based solution for the exterior problem, improving efficiency.

Findings

Effective hybrid FEM-BEM approach for acoustic prediction

New finite element method for exterior problem solving

Enhanced computational efficiency demonstrated

Abstract

In the automotive industry, predicting noise during design cycle is a necessary step. Well-known methods exist to answer this issue in low frequency domain. Among these, Finite Element Methods, adapted to closed domains, are quite easy to implement whereas Boundary Element Methods are more adapted to infinite domains, but may induce singularity problems. In this article, the described method, the SDM, allows to use both methods in their best application domain. A new method is also presented to solve the SDM exterior problem. Instead of using Boundary Element Methods, an original use of Finite Elements is made. Efficiency of this new version of the Substructure Deletion Method is discussed.