Abstract: Optimizing compressor noise design represents a critical technical challenge in refrigeration equipment development, as its acoustic performance directly impacts product competitiveness and user satisfaction. Compressor operation involves refrigerant flow pulsations, mechanical structural vibrations, and electromagnetic noise. These excitation sources transmit outward through structural components such as the compressor housing and mounting brackets, ultimately generating radiated noise. Addresses the generation process of mechanical vibration noise in compressors. Key components underwent geometric model simplification, and a finite element model of the entire compressor was constructed. Modal analysis identified the natural frequencies and vibration mode characteristics of critical structures. Vibration responses simulated using harmonic response analysis served as input, with simulated noise values generated through acoustic radiation simulation. Proposes an innovative finite element simulation method for compressor noise. Validation of different design schemes demonstrates the ability to reduce noise amplitude across various frequency bands. Specifically, applying a modified shape to the upper casing reduces overall noise by 2 dB.

Key words: Refrigeration compressors, vibration, noise, harmonic response analysis