The motion deferential equation of the coupled rotor in gear coupling-bearing system was presented, and a dynamic analysis was carried out upon the gear shaft-gear coupling-motor shaft system in a certain DH typed Chinese centrifugal compressor.

• 给出了齿轮联轴器耦合转子 -轴承系统的运动微分方程 ,并针对某国产DH型离心压缩机齿轮轴 -齿轮联轴器 -电机轴系统进行了动力学分析。