Based on the CAE simulation analysis technology, the dynamic analysis of the sheet metal parts of a certain type of household cabinet air conditioner, combined with the results of the noise diagnosis analysis, realizes the modal vibration optimization of the sheet metal parts by changing the design parameters of the stiffeners, and improves the performance of the sheet metal parts. Vibration and noise reduction performance. The test results show that after optimization, the noise and vibration radiation of the sheet metal parts of the air conditioner is reduced, and the sound quality of the air conditioner is significantly improved. [ABSTRACT FROM AUTHOR]