Numerical Analysis of Noise Radiation of Compressor Shell Considering Lubrication Oil

A finite element method (FEM) was created to simulate the sound radiation of compressor shell based on fluid structural interaction (FSI), by which the structure response (displacements) could be calculated considering the influence of lubrication oil. The coupling modal of shell was stored under different volumes of oil; the structure response (displacements) and the distribution of sound pressure were calculated under excited by concentrated force. According to the analysis results, the 5th and 10th natural frequencies were changed obviously since the presence of lubrication oil. That was, the natural frequency gradually change to low frequency region along with increasing volume of lubrication oil. Peak value of sound radiation aggrandized as the volume of oil grows ranged from 1000 Hz to 2000 Hz, and the corresponding frequency also changed to high frequencies domain. Finally, this conclusion could be confirmed by experiment, which could provide the references for design of refrigerator compressor