To restrain the fluctuation of high frequency noise in the vehicle caused by The uncertainty of the parameters of the acoustic package,this paper proposed an uncertainty analysis and optimization method based on sub-interval modified perturbation method for high frequency noise of automobiles.Firstly,the basic equation of statistical energy for the analysis of high frequency noise was established.Secondly,the uncertainty parameters were divided into several sub-intervals,and the perturbation radius of each sub-interval was calculated by using the modified interval perturbation method to obtain the center value and the perturbation radius of the high-frequency noise performance.Finally,the high frequency noise performance and parts quality of the vehicle were optimized by the cross-interval uncertainty optimization method.This method was applied to analyze and optimize the interior front circumference and carpet of a vehicle.After optimization,the weight of acoustic package parts decreases by 3％,the noise fluctuation range decreases by more than 35％,and the robustness of the system is significantly improved.
维普
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