Characterization and Validation of Acoustic Cavities of Automotive Vehicles

摘要

Passenger compartment acoustic cavity resonances present challenges for NVH engineers. They can be either excited by powertrain or by road inputs. Their coupling with these inputs can cause discomfort and unacceptable sound pressure levels for the driver and passengers. A systematic study of acoustic cavity resonances has been conducted by using a simple analytical expression and the finite element analysis. Both analytical approaches are validated with experimental testing which were performed by using a representative test cabin. For the first several acoustic modes, two analytical approaches yield acceptable approximations with the experimental results.