In the subjective driving evaluation of wind noise in the development stage of a light bus,it was found that there was obvious low-frequency wind noise in the car when it was above 100km/h.The noise data in the car was collected and analyzed,and the sound frequency of"pupu"was between 170-190Hz.According to the diagnosis of the issue,the"pupu"sound comes from the lip of the A-pillar margin seal.To solve the issue of wind noise of A-pillar margin seal,the mechanism of"pupu"sound was studied first.Then,some schemes are studied,such as increasing the flushness between front door and A-pillar,increasing the density of the lip of A-pillar margin seal,and reducing the length of the lip of the A-pillar margin seal.Then the implementation of the above schemes is analyzed,and the scheme that the nominal flushness between the front door and the A-pillar increases to 3mm is determined to be implemented.Finally,the experience is summarized and the design standards are formulated to avoid the wind noise issue of A-pillar margin seal in the subsequent development process of new models.
NETL
NSTL
万方数据
维普
