Use of Statistical Energy Analysis in Vehicle NVH Design Cycle 2010-36-0525
Statistical Energy Analysis (SEA) is used to predict
high-frequency acoustic and vibration response in vehicle NVH
design. Early in the design cycle prototype hardware is not yet
available for testing and the geometry is still too poorly defined
and changing too quickly for Finite Element Analysis or Boundary
Element Analysis to be an effective NVH analysis tool. For most of
the concept phase and early design phase, SEA uniquely offers the
ability to virtually predict the main noise transfer paths and to
support target setting for component and full vehicle NVH design.
At later stages of the design process, SEA combines with NVH
testing to provide more accurate predictions and to provide
guidance for more efficient testing.
This paper describes the established uses of SEA in the vehicle
industry and presents an overview of the NVH design cycle and how
SEA is used to support NVH development at different stages. The
synergy between SEA analysis and full-vehicle and component-level
NVH testing is discussed. The types of testing that most
effectively validate the SEA models and the methodology for
validating the models are presented. Case studies for several
vehicle NVH applications are presented with examples of the use of
SEA prediction and validation measurements. Overall advantages,
limitations, and use of SEA to increase the efficiency of the NVH
development test effort are summarized.