Identification Method for Understanding Main Factors of Vehicle Interior Noise among Body, Frame Vibration and Interior Acoustic Characteristics Using Principal Component Contribution Analysis

Abstract

In this study, we considered a method for clarifying main factors increasing vehicle interior noise using operational transfer path analysis (TPA) principal component model (PCCA: principal component contribution analysis). Through an experiment using simple vehicle physical scale model at an operational condition, the main factors (acoustic resonance in cabin, vibration resonance of body or vibration resonance of flame) were estimated by evaluating the elements of repeated PCCA results and the verification was carried out through the countermeasure for the reduction of the interior noise.