Abstract: Vibration test of a certain type of scroll compressor was conducted according to its vibrations and the high-frequency vibration spectrum for each of the major components of the compressor was achieved. Modal analysis of scroll compressor was carried out through finite element analysis software ANSYS and the first six natural frequency was achieved. The result of vibration spectrum analysis and comparison of the vibration spectrum and natural frequency shows that there is resonance phenomenon on upper shell and the shell contacting with housing is prone to fatigue damage. Three improvement programs have been putted forward. They are increasing the thickness of the upper shell, increasing the radian of the upper shell and increasing the thickness of the shell contacting with housing. The programs were verified through ANSYS. The result of verication shows that increasing the thickness of the shell contacting with housing and increasing the radian of the upper shell are effective.

摘要： 根据某型涡旋压缩机振动情况，对其进行振动测试，获得压缩机各主要零部件的高频振动频谱，采用有限元分析软件ANSYS对涡旋压缩机进行结构模态分析，获得压缩机各主要零部件前六阶固有频率，通过对振动频谱的分析和固有频率与试验振动频谱的对比分析，发现顶盖存在共振现象，支撑架处外壳是疲劳损伤易发部位，为此提出增加顶盖厚度、增加顶盖弧度和增加支撑架处外壳厚度三种改进方案；利用ANSYS对三种改进方案进行有限元分析，对比优化前后顶盖和支撑架处外壳应力应变变化情况，结果表明增加顶盖弧度和增加支撑架处外壳厚度能很好地降低压缩机振动。

关键词: 振动与波, 涡旋压缩机, 振动测试, ANSYS, 减振