As vehicle development timelines continue to shorten, it is necessary for the full vehicle NVH engineer to be able to predict performance without actual prototypes. There has been significant advancement in the accuracy of finite element modeling techniques of trimmed bodies; however accuracy is still low in the road noise mid frequency range from 150-400Hz. Also, calculation times for these frequencies are long, with very large results files in some cases. To alleviate these limitations, a Hybrid approach has been used, where a finite element suspension and drive train model is coupled with a test based Frequency Response Function (FRF) model of the trimmed body. The predicted road noise level was compared to actual vehicle tests and exhibited excellent correlation.
A Hybrid Full Vehicle Model for Structure Borne Road Noise Prediction
Sae Technical Papers
SAE 2005 Noise and Vibration Conference and Exhibition ; 2005
16.05.2005
Aufsatz (Konferenz)
Englisch
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