基于水浸聚焦超声的轴承套圈缺陷检测仿真

Simulation Analysis Of Bearing Ring Defect Detection Based on Water-Immersed Focused Ultrasound

工业上常使用水浸聚焦超声技术对轴承套圈进行缺陷检测,而聚焦探头频率、水层厚度、缺陷位置等因素均会对检测效果造成影响,故基于有限元法对此类影响因素进行仿真研究,模拟在不同探头频率、水层厚度、缺陷位置条件下对轴承套圈进行水浸聚焦超声检测,并通过采集缺陷回波信号来分析它们对于检测效果的影响,得到结论:探头频率应符合能检出的缺陷最小尺寸要求,水层厚度的设置应满足工件底波位于二次界面波之前,当缺陷位置处于焦域时检测效果最好。

In the industry,water immersion focused ultrasonic technology is often used to detect the defects of bearing rings.Factors such as focusing prob e frequency,water layer thickness,and defect location will affect the detection effect.Therefore,based on the finite element method,simulation research is cond ucted on such influencing factors to simulate water immersion focused ult rasonic testing of bearing rings under the conditions of different probe frequencies,water layer thickness,and defect location.Collecting defect echo signals to analyze their impact on the detection effect,it is concluded that the prob efrequency should meet the requirements for the minimum size of defects that can be detected,and the water layer thic kness should be set to ensure that the detect ion effect is best when the bottom wave of the bearing is in front of the secondary interface wave and the defect position is in the focus area.