[연료 및 윤활유부문] Panel Contribution Analysis By using Acoustic Reciprocity

vehicle Vibration & Noise is evaluated by Sound Pressure Level in cavity. In order to reducing Solll1d Pressure Level. Vehicle vibration is to reduce. Vehicle Vibration is affected by engine force, road profile and Structure of Vehicle etc. Engine force and road profile is impossible to change, so to reduce SPL(Sound Pressure Profile) is to lower level of panel vibration. After running normal mode analysis, Mode shapes showed that which modes were global or local. Modal participation to SPL(Sound Pressure Level) got firm Modal Participation factor analysis. But the contribution of panel vibration to SPL was not found This paper focuses on how to get contribution of panel vibration. Sensitive position of panel was found by applying acoustic reciprocity. To verify results, mass was added to sensitive panel position. SPL was reduced after mass was added. Also similar result got firm result of modal participation factor analysis. This method is applicable to predict position of sensitive panel vibration.