Extraction of high contributing vibration mode to vehicle interior noise using OTPA

In this study, we considered a method for selecting high contributing body panel vibration mode to the interior noise utilizing operational TPA (OTPA) . Simple vehicle body model was employed and operational test was carried out by using two exciters. Acceleration vibration at multiple points on the each body panel and the interior noise were measured simultaneously as the reference and response signals for OTPA. Subsequently, high contributing principal component mode of each body panel to the interior noise was obtained in the OTPA using principal component model. Finally, high contributing body vibration modes were extracted in many body modes by associating the high contributing PC mode of each panel with them.