Modelling Acoustic Trims in FEM, an Overview of the Different Simulation Methods 2016-01-1849
The need for the industry to simulate and optimize the acoustic trim parts has increased during the last decade. There are many approaches to integrate the effect of an acoustic trim in a finite element model. These approaches can be very simple and empirical like the classical non-structural mass (NSM) combined to a high acoustic damping value in the receiver cavity to much more detailed and complex approach like the Poro-Elastic Materials (PEM) method using the Biot parameters. The objective of this paper is to identify which approach is the most appropriate in given situations.
This article will first make a review of the theory behind the different methods (NSM, Impedances, Transfer Matrix Method, PEM). Each of them will be investigated for the different typical trim families used in the automotive industry: absorber, spring/mass, spring/mass/absorber. An academic (flat plate and cavity) and an automotive based test case with thickness distribution variation over the trim part will be studied. For each case, the results will be discussed and the best compromise for modeling time and results quality will be identified. The analysis will focus on full FE models up to 400Hz excited by structure borne and airborne excitations.
Citation: Caillet, A., Alimonti, L., and Golota, A., "Modelling Acoustic Trims in FEM, an Overview of the Different Simulation Methods," SAE Technical Paper 2016-01-1849, 2016, https://doi.org/10.4271/2016-01-1849. Download Citation
Author(s):
Arnaud Caillet, Luca Alimonti, Anton Golota
Affiliated:
ESI GmbH, ESI US R&D
Pages: 7
Event:
9th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Simulation and modeling
Acoustics
Springs
Parts
Finite element analysis
Technical review
Logistics
Optimization
Bearings
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
