Enhancing the Robustness of Car Body NVH Characteristics with Considering of the Uncertainty of the Body Parts

Abstract

The method to reduce the scattering of the response level of frequency response function (FRF) without reducing scattering of each parts uncertain characteristics is investigated. To find the solution which can minimize both mean and standard deviation of the response level of FRF, the response surface model that can express the mean and the standard deviation is derived. The solution which minimized the mean and standard deviation is applied to the full vehicle model. And it is confirmed that the scattering range reduced than initial condition. By using this method, the robustness is enhanced without controlling uncertain characteristics of each parts.