Acoustic emission source location on a cylindrical shell structure through grouped sensors based analytical solution and data field theory. (April 2022)

• Record Type: Journal Article
• Authors: Liu, Caiyun; Shang, Xueyi; Miao, Runxue
• Is Part Of: Applied acoustics. Volume 192(2022)
• Publication Date: 2022-04
• Subjects: Acoustic emission -- Source location -- Cylindrical shell structure -- Grouped sensors -- Analytical solution; Acoustical engineering -- Periodicals; Periodicals; 620.2
• DOI: 10.1016/j.apacoust.2022.108747
• Languages: English
• ISSNs: 0003-682X

Abstract

Highlights: An analytical solution from grouped sensors has been derived for acoustic emission (AE) source location on a cylindrical shell structure. An analytical solution and data field theory combined technique has been proposed for a stable AE source location. Pencil-lead breaks (PLBs) are selected to remove P-wave arrival time system errors between sensors for an accurate AE source location. Both synthetic and PLB tests verify the effectiveness of the proposed method in locating an AE event. Abstract: Cylindrical shell structures are widely used in the fields of mining engineering, tunneling engineering and material structures, where acoustic emission (AE) source location plays an important role in monitoring engineering fractures. The commonly used AE source location method for cylindrical shell structures has several shortcomings. First, it must select the shortest ray path from multiple possible ray paths, making it hard to derive an analytical solution and is inconvenient for iterative solutions. Moreover, a local optimal solution may be obtained through a single time event location. To address these issues, we propose an AE source location method, which combines grouped sensors based analytical solution and data field theory. Synthetic tests of 18, 360 generated events with Gaussian noises (mean value = 0us, standard deviation = 2.5us) included for P-wave travel time show an average location error within 2 cm. Furthermore, the average location error of 53 pencil-lead breaks is 2.43 cm. Moreover, the results verify that it is necessary to remove the P-wave arrival time system error between sensors prior to AE event location. In conclusion, the proposed analytical solution is helpful for rapid AE location on a cylindrical shell structure, and the application of data field can overcome the local optimal problem of a single time location.