航空螺栓超声检测中参数确定与波形分析

Parameters Setting and Waveform Analysis in Ultrasonic Inspection for Aviation Bolts

超声纵波法是原位检测航空螺栓的理想方法,为了优化超声检测参数,提高在役航空螺栓损伤检测的可靠性,选用典型航空螺栓作为试验件,在不同位置制作模拟裂纹缺陷,采用多种参数对螺栓进行检测,分析检测中出现的波形和不同检测参数对检测结果的影响。结果表明,较低的频率和较小尺寸晶片检测效果较好针对变形波干扰进行分析,提出了有效的评判措施和对策,提高了缺陷检测的可靠性和缺陷波判别的准确性。

The ultrasonic longitudinal wave method is an ideal method for in-situ bolt detection.In order to optimize the ultrasonic testing parameters and improve the reliability of in-service aviation bolt damage detection,the typical aviation bolts are selected as test specimens in this paper,the simulated crack defects were made at different positions,and various parameters were used to test the bolts.The influences of the wave forms and different parameters on the test results were analyzed,lower frequency and smaller chip size are better.At the same time,this paper analyzes the interference of deformation wave,and puts forward effective measures and countermeasures to improve the reliability of defect detection and the accuracy of defect wave discrimination.