Transfer Path Analysis Using Engine Radiated Sound And Mount Vibration

One of the main areas of consideration in defining vehicle customer satisfaction is vehicle interior sound and vibration. Engine radiated sound and mount vibration are significant contributors to vehicle interior sound and vibration. Characterizing their contribution requires a detailed and methodical analysis that may be used to establish baseline levels, identify manufacturing deficiencies, and influence design changes for baseline improvements of vehicle interior sound and vibration. Component-level testing such as engine sound and vibration testing is performed frequently because it is more practical and less costly compared to similar vehicle-level testing. Thus, estimating vehicle performance based on engine performance can potentially provide cost reduction benefits at all stages of vehicle design and manufacturing. The objectives of this study are to: 1. Develop a vehicle interior sound and vibration numerical estimation method based on engine radiated sound and mount vibration and verify the estimations by actual vehicle interior sound and vibration measurements at all operating conditions under investigation. 2. Evaluate the contribution of individual engine air-borne and structure-borne sources of sound and vibration to the total vehicle interior sound and vibration.