高速电机在设计、制造和运行过程中会出现大量的问题，若仅依靠经验不断地摸索解决，将会耗费大量的时间，效率极低。为此，可以利用合适的计算分析软件对结构进行针对性的分析和优化。利用转子动力学方法对转子结构的振动性能进行评估，继而进行转子结构优化，这是一种行之有效的方法。以1台双轴伸电机的转子振动为例，利用梁单元方法求解转子的静挠度，并使用有限元分析软件ANSYS对电机转子进行转子动力学分析，找出转子振动的原因，并根据计算结果和转子结构的特点进行针对性的优化，根据优化方案对转子结构进行调整，成功解决了该电机的转子振动问题。

There are a lot of problems in the design, manufacture and operation of high-speed motor. Solving these problems by experience is time-consuming and inefficient. Using the appropriate calculation and analysis software to analyze and optimize the structure can achieve good results. It is an effective method to evaluate the vibration performance of the rotor structure by using the rotor dynamics method, and then optimize the rotor structure. Taking the rotor vibration of a double-shaft-extension motor as an example, the static deflection of the rotor is solved by the beam element method, and the rotor dynamics is analyzed by the finite element analysis software ANSYS to find out the reason of the rotor vibration, and the rotor structure is optimized according to the calculation results and the structural characteristics. The rotor structure of the doubleshaftextension motor is adjusted according to the optimization scheme, and the rotor vibration problem of the motor is solved successfully.