Axial stress measurement method for hollow cylindrical steel structures based on non-dispersive characteristics of T (0,1) guided waves

• Published in: Measurement : journal of the International Measurement Confederation Vol. 220; p. 113332
• Main Authors: Deng, Sen, Wang, Shaokai, Zhao, Bo, Liu, YePing, Tan, Jiubin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2023
• Subjects: Acoustic elastic effect; LMS-Gabor algorithm; Stress monitoring; T (0, 1) guided wave; Stress monitoring; LMS-Gabor algorithm; Acoustic elastic effect; T (0, 1) guided wave
• ISSN: 0263-2241; 1873-412X
• DOI: 10.1016/j.measurement.2023.113332

This article presents an equivalent sound propagation model for hollow cylindrical structures subjected to axial stress, which yields theoretical solutions for sound velocity changes in steel pipes under varying stress levels. To enable the excitation and detection of T (0,1) mode guided waves in hollow steel pipes, an electromagnetic ultrasonic transducer (EMAT) array based on the principle of magnetostriction is designed and tested. To accurately extract nanosecond-level sound time changes due to stress, this study devises the LMS-Gabor algorithm, which exploits the non-dispersive properties of T (0,1) mode guided waves to process the echo signal. Experimental results demonstrate that this stress measurement approach can achieve high accuracy, even in the presence of noise and signals in the same frequency band. •This study proposes an acoustic elasticity-semi analytical finite element model of hollow cylindrical steel pipes.•This study obtained the torsional mode dispersion curves of steel pipes under different stress states.•Designed an LMS-Gabors algorithm to improve the accuracy of stress measurements.