Title: Engine block soundproofing: on meta-models of poroelastic materials for acoustic absorption and head injury criterion

Authors: Slaheddine Chedly; Ameur Chettah; Mohamed Ichchou

Addresses: LTDS, Equipe Dynamique des Systèmes et des Structures, UMR 5511 Ecole Centrale de Lyon, 69134 Ecully, France ' LTDS, Equipe Dynamique des Systèmes et des Structures, UMR 5511 Ecole Centrale de Lyon, 69134 Ecully, France ' LTDS, Equipe Dynamique des Systèmes et des Structures, UMR 5511 Ecole Centrale de Lyon, 69134 Ecully, France

Abstract: The purpose of this work is the investigation of meta-models quantifying shock and acoustic indicators. The vehicle design of the engine block insulating poroelastic materials is considered. An analytical tool is proposed. It facilitates decision-making. Modelling tools (Design of Experiments techniques, kriging models,) are used to build empirical models expressing the Head Injury Criterion (HIC) and the acoustic absorption coefficient of poroelastic materials. Models defined here allow HIC and acoustic absorption predictions to be made for any porous material whose intrinsic characteristics are included in the design space. Such models offer effective alternative to finite-element formulations, with considerable time saving.

Keywords: acoustic absorption; HIC; head injury criterion; metamodelling; poroelastic materials; kriging models; engine block soundproofing; vehicle design; shock; insulating materials; decision making; modelling; design of experiments; DoE; porous materials.

DOI: 10.1504/IJVD.2013.051586

International Journal of Vehicle Design, 2013 Vol.62 No.1, pp.72 - 86

Received: 12 Oct 2009
Accepted: 15 Apr 2010
Published online: 12 Apr 2013 *

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