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Title: Scattering of acoustic waves by movable lightweight elastic screens
Authors: Tadeu, A. 
Godinho, L. 
Keywords: Elastic barrier; Sound propagation; Boundary element method
Issue Date: 2003
Citation: Engineering Analysis with Boundary Elements. 27:3 (2003) 215-226
Abstract: This paper computes the insertion loss provided by movable lightweight elastic screens, placed over an elastic half-space, when subjected to spatially sinusoidal harmonic line pressure sources. A gap between the acoustic screen and the elastic floor is allowed. The problem is formulated in the frequency domain via the boundary element method (BEM). The Green's functions used in the BEM formulation permit the solution to be obtained without the discretization of the flat solid-ground interface. Thus, only the boundary of the elastic screen is modeled, which allows the BEM to be efficient even for high frequencies of excitation. The formulation of the problem takes into account the full interaction between the fluid (air) and the solid elastic interfaces.
Rights: openAccess
Appears in Collections:FCTUC Eng.Civil - Artigos em Revistas Internacionais

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