介绍了对一个复杂结构—斜齿圆柱齿轮模型的创建方法，以及利用ANSYS对其进行固有频率和振型研究即模态分析的方法、步骤和过程。(This paper introduces a method for creating a complex structure - a helical gear model, and the method, procedure and process of the modal analysis of its natural frequency and mode of vibration using ANSYS.)