Browse Publications Technical Papers 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. 1
    synthetic and pertinent energetic outputs;
  2. 2
    optimal SEA partitions of the finite element mesh;
  3. 3
    quality indicators of existing SEA partitions.
The methodology involves six different steps, some required, some optional:
  1. 1
    automatic partitioning of the FEA model in patches;
  2. 2
    calculation of distribution matrices;
  3. 3
    definition of mechanical loads;
  4. 4
    definition of damping characteristics;
  5. 5
    modal-based vibro-acoustic response calculation;
  6. 6
    energetic post-processing;
  7. 7
    automatic partitioning in SEA subsystems;
  8. 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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