轴裂纹故障对齿轮耦合系统固有特性的影响

The Influences of a Cracked Shaft on the Inherent Characteristics of a Gear System

利用SolidWorks软件建立了齿轮-轴系耦合系统的模型,将其导入ABAQUS软件进行模态分析,用Lanczos法提取系统前九阶固有频率和振型,预估结构的振动特性,对系统的动态响应分析提供了理论基础。在从动齿轮轴上定义crack seam,建立了带有裂纹轴的齿轮耦合系统的有限元模型,并分析了其固有振动特性。对比正常耦合系统,分析了裂纹对齿轮耦合系统的固有特性的影响。结果表明,齿轮轴出现裂纹后固有频率降低,对振型的影响也较大,为齿轮轴裂纹故障的监测和识别提供了一定的理论参考。

A solid model of a gear shaft coupling was established using SolidWorks. The modal analysis was peormed with ABAQUS. The first nine inherent frequency stages and vibration type were extracted using the Lanczas method. Modal analysis can effectively estimate the vibration characteristics and provided a theoretical basis for the dynamic response of the system. The finite element model of the gear system with a cracked shft was created in ABAQUS and the inherent characteristics of the model were analyzed. It researched the influences of a cracked shaft on the inherent characteristics of a gear system when compared with the inherent characteristics of the normal model. The results show that the crack lead to decreases in the inherent frequency of the gear system. Modes change a lot because of the emergence of crack. The results provide theoretical support for fault diagnosis of gear system with cracked shaft.