In spite of development of compressor technology in its capacity, there are still many problems to improve with respect to noise and vibration. In order to understand the mechanism of the noise generation and reduce the vibration and noise level, it is necessary to understand the dynamic characteristics of compressors. In this study, suspension spring is modeled as flexible body, and the other parts of reciprocal compressor are modeled as rigid bodies. Each rigid body and spring is connected with joints. The dynamic analysis is performed with DADS. Using the compressor model, the characteristics of frame vibration is examined as the variation of offset, connecting rod, and eccentricity, by comparing the change of side pressure and frame behavior. With these results, weight balance is redesigned. The vibration characteristics of the frame is compared with experimental results.
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