The Inspection of Kelly Bars by Ultrasonic Guided Waves

被引：0
|
作者：
Wan X. [1 ,2 ]
Pan H. [1 ,2 ]
Zhang X. [1 ,2 ]
Fan H. [1 ,2 ]
Huang L. [1 ,2 ]
机构：
[1] School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an
[2] Shaanxi Key Laboratory of Mine Electromechanical Equipment Intelligent Detection and Control, Xi'an
来源：
Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis | 2023年 / 43卷 / 06期
关键词：
dispersion curves; guided waves; kelly bars; semi-analytical finite element method;
D O I：
10.16450/j.cnki.issn.1004-6801.2023.06.006
中图分类号：
学科分类号：
摘要：
Using traditional ultrasonic method to inspect kelly bars with the length up to ten meters is extremely time-consuming and inefficient. In order to solve this problem，the use of ultrasonic guided waves for the inspection of kelly bars is proposed. Firstly，the dispersion curves of kelly bars are derived by using semi-analytical finite element method. The dispersion curve of L（0，2）mode at the frequency range from around 70 kHz to 130 kHz is relative flat and it has highest group velocity values. L（0，2）mode is thus selected as the ultrasonic guided wave inspection mode. Secondly，the center excitation frequency is optimized and selected as 100 kHz. A ring of piezoelectric transducers with the size of 25 mm ×5 mm ×0.5 mm is selected to improve the signal-to-noise-ratio of L（0，2）mode at the center frequency of 100 kHz. Lastly，L（0，2）mode ultrasonic guided waves is applied to inspect kelly bars by numerical and experimental methods. The results show that L（0，2）ultrasonic guided wave is capable of detecting circular through-hole damages located in the plane and near the edge in a kelly bar. Furthermore，the slot damage near the edge of a kelly bar can also be detected. The inspection efficiency is dramatically improved. Therefore，the use of longitudinal L（0，2）mode ultrasonic guided wave provides a promising and effective alternative for the detection of defects in kelly bars. © 2023 Nanjing University of Aeronautics an Astronautics. All rights reserved.
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页码：1088 / 1094
页数：6
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