Abstract
In the present research, the vibration intensity was measured by the three-channel method on air-conditioner compressor casings, and the vibration energy flow pattern was analyzed. Distributions of the vibration energy sources and sinks on the casing were identified using the time-averaged vibration intensity and the envelope vibration intensity. The vibration-energy flow pattern and energy source distribution were compared between compressors with and without noise-vibration reduction measures to discuss whether the measures were effective. The results showed that energy sources existed near the lower edge of the stator, and then the energy flowed into compressor lower part with low rigidity. The results showed also the magnitude of energy sources for the compressor with noise-vibration reduction measures were much smaller than that without the measures.
