传动轴结构损伤识别的数值模拟试验

在带有裂纹的轴结构件中，当裂纹较小时，传动轴的裂纹参数与其固有频率的变化率相关联。通过对由固有频率的变化率确定轴结构件裂纹参数的理论分析和通过截取频率变化率趋势图的等高线并取其交点来反推出裂纹的位置和深度的方法，可识别其裂纹位置和深度。文中给出了有关计算公式，并进行了数值模拟。从模拟结果看，这种方法可以很好地识别传动轴的损伤程度，从而为轴结构件的改进设计及含裂纹的轴结构件剩余寿命的估算提供了理论依据。

On Identification of the Crack Parameters in the Shaft Structure Components

The crack parameters are related with the fractional change of the natural frequencies in the cracked shaft when the crack is shallow. So, the calculation of the fractional change of the natural frequencies can be used to detect the both location and depth of the cracks. The result will be delivered to the reforming design and the rest life estimation of the shaft structure components with cracks.