抄録
In order to simulate interior wind noise of a vehicle, a coupling analysis of aerodynamic, structural vibration and acoustic were conducted. The prediction accuracy of noise was verified to compare with that of wind tunnel experiments. The predicted results are in good agreement with the measurement of wind tunnel experiments. It was confirmed that it is possible to predict the interior noise of up to 4 kHz. We also attempted to estimate contributions of each part to interior noise. As a result, it found that the sound insulation effect of the trim of the door portion and the roof is very large. Since trim reduced high-frequency noise, the noise contribution of windows became relatively large at high frequency region. On the other hand, the contribution of windows is small at low frequency region. It means when trims are removed, the contribution of doors become large.
