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Efficient Trim Modelling Simulation Method for Vehicle Design Phase
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 13, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Event: 10th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
During the design phase of a vehicle, it is important to have a simulation tool, which allows to make multiple runs and check the sensitivity of the acoustic response to several trim configurations with a quick turnover time.
The Statistical Energy Analysis (SEA) is widely used to investigate such problems for airborne excitation. For structure-borne excitation, classical methods based on a simplistic modeling of the trim using 1D oscillators and non-structural mass are not accurate enough to capture the actual behavior of the trim. On the other hand, a detailed Finite Element-Poroelastic Element Method (FE-PEM) modeling strategy of the trim may be time consuming. Besides the large number of degrees of freedom required to accurately model dissipative materials (e.g. poroelastic), a FE-based approach also needs a preprocessing phase where each layer of the trims must be carefully meshed. This task can be time consuming when the response of several configurations of the same system must be simulated, like, for instance, in an optimization process.
In this paper, two alternative strategies based on the Transfer Matrix Method (TMM) are proposed to evaluate the surface impedance of the trim. This impedance can be applied to the FEM model of the bare vehicle and allow a first design change analysis before a more detailed concept validation done using FE-PEM.
The method will be demonstrated on industrial example.
CitationCaillet, A., Alimonti, L., and Van Hal, W., "Efficient Trim Modelling Simulation Method for Vehicle Design Phase," SAE Technical Paper 2018-01-1568, 2018, https://doi.org/10.4271/2018-01-1568.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
- Hamdi, M.A., Zhang, C., Mebarek, L., Anciant, M. et al. , “Analysis of Vibro-Acoustic Performances of a Fully Trimmed Vehicle Using an Innovative Sub-Systems Solving Approach Facilitating the Cooperation between Carmakers and Sound-Packages Suppliers,” in Proceedings of EURODYN2005, Paris, France, Sept. 2005, 1179-1185.
- Anciant, M. et al. , “Full Trimmed Vehicle Simulation by Using RAYON-VTM,” in JSAE, Japan, 2006.
- Caillet, A., Guellec, A., Blanchet, D., and Roy, T. , “Prediction of Structureborne Noise in a Fully Trimmed Vehicle Using Poroelastic Finite Elements Method (PEM),” SAE Technical Paper 2014-01-2083, 2014, doi:10.4271/2014-01-2083.
- Duval, A. et al. , “Trim FEM Simulation of a Dash and Floor Insulator Cut Out Modules with Structureborne and Airborne Excitations,” in Euronoise-Acoustics’08, Paris, France, 2008.
- Rondeau, J., Dejaeger, L., Guellec, A., Caillet, A. et al. , “Cockpit Module Analysis Using Poroelastic Finite Elements,” SAE Technical Paper 2014-01-2078, 2014, doi:10.4271/2014-01-2078.
- Alimonti, L. and Atalla, N. , “Efficient Modeling of Flat and Homogeneous Acoustic Treatments for Vibroacoustic Finite Element Analysis. Direct Field Formulations,” Journal of Sound and Vibration 367:84-100, 2016.
- Alimonti, L. and Atalla, N. , “Efficient Modeling of Flat and Homogeneous Acoustic Treatments for Vibroacoustic Finite Element Analysis. Finite Size Correction by Image Sources,” Journal of Sound and Vibration 388:201-215, 2017.