実稼働TPAを用いた車内騒音に対する高寄与振動モードの把握

‐各面の主成分寄与を用いた高寄与ボディモードの抽出法‐

抄録

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.