Analysis and Improvement of Car Interior Roaring Noise
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Shuhua Liao, Xu Zhang, Li Liu, Guobin Liu, Zhujian Chen
There is 2500 rpm roar in the 3G WOT acceleration, and the subjective feeling is poor. Through further investigation and verification, it is found that when the car accelerates to about 2500rpm, the ODS of the front sub-frame is basically consistent with the first order modal shape of 83.6Hz, which was the main factor causing the roar of the car. In order to solve this problem, the idea of the equivalent method of the car body boundary is introduced to carry out FEM and the improved program is put forward. Finally, the improved program effectively solved the problem of acceleration roar at 2500rpm.
3G WOT, ODS, mode, FEM.