Automotive Wind Induced Interior Noise Optimization Using FEM
The CFD coupled with acoustic solver(FEM)calculation method is used in this paper to analyze the external flow field and the internal and external sound field of a certain vehicle model code-named TMS in the 140km/h working condition.The direct calculation method is used to calculate and analyze the sound pressure of the monitoring points outside the vehicle,A-pillar,rear-view mirror and the surface of the window.Then the interior noise level is calculated by using the finite element method and the interior noise level and the sound pressure distribution on the window glass are analyzed emphatically.According to the results of the analysis,two improvements were proposed in terms of exterior styling,namely the thinning of the handle and the convex feature at the front of the side window.Through the comparison between the sound pressure level curve of the driver's left ear,the above schemes can reduce the interior noise level by 0～2dB to different degrees,the reduction has reached the initial purpose of noise reduction,and it has certain reference significance for the later application of this method for the study of aerodynamic noise in automobile vehicles.
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