Making Sense of Large FEA NVH Databases using SEA Concepts

Benoît Van den Nieuwenhof; Grégory Lielens; Jean-Pierre Coyette; Jean-Louis Guyader; Nicolas Totaro; Pascal Bouvet

doi:10.4271/2007-01-2183

2007-05-15

Making Sense of Large FEA NVH Databases using SEA Concepts 2007-01-2183

The paper presents an energetic post-processing methodology for large-scale vibro-acoustic finite element models. Starting from a dynamic and an acoustic modal basis produced by a finite element analysis (FEA), the methodology produces:

1
synthetic and pertinent energetic outputs;
2
optimal SEA partitions of the finite element mesh;
3
quality indicators of existing SEA partitions.

The methodology involves six different steps, some required, some optional:

1
automatic partitioning of the FEA model in patches;
2
calculation of distribution matrices;
3
definition of mechanical loads;
4
definition of damping characteristics;
5
modal-based vibro-acoustic response calculation;
6
energetic post-processing;
7
automatic partitioning in SEA subsystems;
8
verification of existing SEA partitions.

Each step will be presented in turn. The methodology will be illustrated by application of the successive steps to a Renault Laguna body and an Alstom two-storey TGV train section.

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Making Sense of Large FEA NVH Databases using SEA Concepts 2007-01-2183

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