Simulation of randomly excited acoustic insulation systems using finite element approaches
(2004) 18th International Congress on Acoustics — Location: Kyoto, Japan (4.April.2004)
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- Abstract
- Acoustic transmission properties of sound-insulating structures play an important role in the design of many transport systems (as, for instance, automotive, aircraft and railway products). Design procedures require efficient computational tools based on the selection of appropriate numerical models for both the insulating structure and the surrounding (bounded or unbounded) acoustic domains. Additionally the description of excitation mechanisms requires some caution and weak or strong coupling effects should be taken into account. The paper presents the main features of a refined finite element approach for addressing acoustic transmission problems in a random context. The model relies on the usual elasto-acoustic approximations. A particular attention is devoted to the description of turbulent boundary layer excitations. The handling of such spatially correlated random excitations is described both in direct (physical) and reduced (modal) contexts. A powerful asymptotic modal formulation is identified. Comparisons with reference analytical solutions are presented and demonstrate the validity of the proposed method. Further application to a reduced scale greenhouse model (from the EC-funded project SMILE) is presented.
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Citations
Coyette, J.-P., Knapen, T., Lielens, G., Meerbergen, K., & Ploumhans, P. (2004). Simulation of randomly excited acoustic insulation systems using finite element approaches. 8th International Congress on Acoustics, 4 pp. https://hdl.handle.net/2078.5/218896