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Communication Dans Un Congrès Année : 2012

Application of admittance optimization to the design of a low-height tramway noise barriers

Résumé

An urban low-height barrier meant to attenuate tramway noise emission for nearby walking pedestrians or cyclists is studied. A numerical method coupling the two dimensional BEM and a gradient-based optimization algorithm is proposed to optimize the admittance distribution on the barrier in order to enhance the broadband insertion loss in the shadowing zone. The gradient of the broadband attenuation is calculated e ciently using the adjoint state approach which makes it possible to use a large number of parameters without significant increase of computation time and to consider a barrier of arbitrary shape. A few admittance designs coupling porous layers and micro-perforated resonant panels covering barriers of classical shapes are proposed, all showing an improvement of several dB(A) compared to more simple admittance distributions.
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Dates et versions

hal-00781159 , version 1 (25-01-2013)

Identifiants

  • HAL Id : hal-00781159 , version 1

Citer

Alexandre Jolibois, Denis Duhamel, Victor W. Sparrow, Jérôme Defrance, Philippe Jean. Application of admittance optimization to the design of a low-height tramway noise barriers. Internoise 2012, Aug 2012, New York City, NY, United States. pp.727. ⟨hal-00781159⟩
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