Abstract
For considering countermeasure of the noise in vehicle cabin, structure-acoustic coupling analysis needs to be conducted. Conventionally, the input identification under operational condition has been the first step to tackle with the problem. However, the input identification is usually time-consuming and needs practical skills. This paper proposes a new sensitivity analysis for the noise reduction under operational condition without using input identification. The structure modification is investigated based on the operational response. The proposed method is applied to the mass-added structure modification. It is confirmed that the noise level decreases as it was predicted based on the proposed approach.
