I School of Mechanical and Electrical Engineering, Jilin Institute of Chemical Technology,
Jilin City 132022, China
2 School of Information and Control Engineering, Jilin Institute of Chemical Technology,
Jilin City, 132022, China,
Abstract: In this paper, a guided wave model of the L(0,1) mode of the pipeline is constructed based on COMSOL to explore the influence of different defect parameters on the echo characteristics, and numerical simulation is carried out using a 35 kHz Hanning window signal. Combined with MATLAB, a defect location algorithm was developed to conduct a comparative analysis of full-penetration cracks from multiple angles. The results show that the traditional damage coefficient method has significant instability in circumferential positioning, while the circular trajectory curve method can achieve higher accuracy at all angles, especially at 45 ° to 60 ° The research verified the effectiveness and innovation points of this method in improving the circumferential positioning accuracy of defects in guided wave pipelines
