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http://dx.doi.org/10.5050/KSNVE.2014.24.8.606

Development of FE-SEA Hybrid Model for the Prediction of Vehicle Structure-borne Noise at Mid-frequencies  

Yoo, Ji Woo (HMC NV CAE Team)
Chae, Ki-Sang (HMC NV CAE Team)
Charpentier, A. (ESI Japan)
Lim, Jong Yun (ESI Korea)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.24, no.8, 2014 , pp. 606-612 More about this Journal
Abstract
Vehicle simulation models for noise and vibration prediction have been developed so far generally in two schemes. One is FE models generally used for problems below 200 Hz such as booming noise, and the other is SEA models for high frequencies of more than 1 kHz, representatively related to sound packages. There have been many researches to develop a simulation model for 200~1000 Hz, so-called mid-frequency region, and this paper shows one practical result that covers the trimmed body of a sedan vehicle. The simulation model is developed based on an FE model, and then FE elements at some areas are substituted with SEA elements to reduce DOFs. SEA panels are described by modal density, radiation efficiency, stiffness and damping characteristics that are found from some numerical assessments. Sound packages are modeled similarly as a conventional SEA model. The results obtained from the hybrid model were compared to experimental results. Predicted pressure and vibrational velocity generally show a good agreement. The developed simulation model and related technology are successfully being used in vehicle development process.
Keywords
Mid-frequency; Hybrid Model; FE; SEA; NV; Modal Density; Radiation Efficiency; Sound Packages;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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