Cabin Noise Control Based On Acoustic Transfer Vector

The interior noise level of a vehicle is an important indicator of the evaluation of vehicle performance, the analysis and control of the interior noise has penetrated into the vehicle development process. A series of studies have been done on the basis of theoretical analysis to control the interior noise of an excavator driving.Firstly, structural FE model and acoustic FE and BE models of the mining vehicle cabin have been built, and the structural and acoustic FE modal analysis has been carried out. Also the test of the field sound pressure have been done.Secondly, the load of the cabin has been acquired indirectly. On this basis, the focused frequency where the peak sound pressure was has been found by calculating coupled the field point sound pressure.The cabin acoustic sensitivity has been considered too large by the acoustic sensitivity analysis of the cabin. The panels and structural modes which had a large contribution to the peek sound pressure have been found out by panel contribution analysis and modal contribution analysis.Finally, the peak sound pressure has been reduced because the stiffness of the right side of the circumference has been enhanced. Then interior sound field frequency response analysis of the cabin which has been optimized has been re-calculated. Then the field point sound pressure has ultimately been effective controlled.