Investigation of Parts with Insufficient Accuracy for Prediction of Noise and Vibration by Sensitivity Analysis

Abstract

In automotive development processes, noise and vibration of a vehicle are predicted using CAE. However, sometimes it happens that the frequency response functions (FRFs) of numerical model and those of the actual model do not correspond with each other. Therefore, a method for efficiently analyzing the factors of lack of precision is demanded to improve the accuracy of numerical model. Therefore, the method of finding out the parts with insufficient accuracy in numerical model is investigated by utilizing sensitivity analysis. The proposed method is applied to a real automotive structure of what we call cutbody (the front half of the body). As a result, it is suggested that the proposed method can indicate the parts in the numerical model with insufficient accuracy from the viewpoint of the mass or stiffness property.