Open Access

ARTICLE

Numerical Investigation of a Vibroacoustic Analysis with Different Formulations

M. Amdi¹, M. Souli¹, J. Hargreaves², F. Erchiqui³

1 LML, Boulvard Paul Langevin, Cité scientifique, 59655 Villeneuve d’Ascq Cedex, France
2 The Arup Campus, Blythe Gate, Blythe Valley Park, Solihull, West Midlands, B90 8AE
3 Université du Québec en Abtitibi-Témiscaminque, 445Boul. de l’Université, Rouyn-Noranda QC, Que., Canada J9X5E4

Computer Modeling in Engineering & Sciences 2012, 85(4), 329-346. https://doi.org/10.3970/cmes.2012.085.329

Abstract

Simulation of vibroacoustic problems becomes more and more the focus of engineering in the last decades for acoustic comfort in automotive industry to reduce noise and vibration inside a cabin and also in sport industry to analyze sound produced by a club impacting a golf ball to avoid unexpected noise problems during the design process. Traditionally, Finite element and Boundary element methods are used in frequency domain to model pressure noise from structure vibration in low and mid frequency range. These methods require velocity in frequency domain on the vibrating structure as boundary conditions. To analyze pressure noise from impact analysis like in golf problem for instance, time domain analysis of nonlinear finite element method using explicit or implicit time integration, needs to be performed first, to supply velocity boundary conditions for the acoustic problem. In this paper a combined time domain and frequency domain analysis is performed to solve acoustic problems of vibrating structure. In this paper we use the state of the art in LSDYNA code that combine both analysis to analyze pressure noise deduced from a short time impact on a deformable structure. To validate numerical results from our simulation, different formulations are performed and validated to simulate pressure sound at different locations.

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Keywords

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