A Waveguide Approach for Computing Exterior Acoustic Radiation

Denis Duhamel (1)

1 Dynamique des structures et identification

Many approaches, like the finite or boundary elements, have been used in the past for computing the radiation of wave in unbounded media. However, both methods can lead to a large number of degrees of freedom and, consequently, to heavy computations when the frequency increases. Here, a waveguide approach is proposed for solving this problem in which propagating waves are first computed on a small rib around the radiating body. The solution of the problem is then decomposed into wave components and only radiating components are kept. This allows a solution of radiation and scattering problems while limiting the discretization to a very small part of the exterior domain. Examples are given to estimate the efficiency of the proposed method

Domaines: Matériaux et structures en mécanique [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]

Denis Duhamel. A Waveguide Approach for Computing Exterior Acoustic Radiation. Forum Acusticum 2011, Jun 2011, Aalborg, Denmark. pp.139-144. ⟨hal-00668517⟩