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:
synthetic and pertinent energetic outputs;
optimal SEA partitions of the finite element mesh;
quality indicators of existing SEA partitions.
The methodology involves six different steps, some required, some optional:
automatic partitioning of the FEA model in patches;
calculation of distribution matrices;
definition of mechanical loads;
definition of damping characteristics;
modal-based vibro-acoustic response calculation;
automatic partitioning in SEA subsystems;
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.