Study on Joint Method of 3D Acoustic Emission Source Localization Simplex and Grid Search Scanning
Liu Wei-jian， Wang Hao-nan，Xiao Yang，Hou Meng-jie， Dong Sen-sen，Zhang Zhi-zeng，Lu Gao-ming
1. School of Civil Engineering, Zhongyuan University of Technology, Zhengzhou 451100, China.
2. ANY SCIENCE & TECHNOLOGIES(CHANGZHOU) INC.
3. State Key Laboratory of Shield Machine and Boring Technology, Zhengzhou 450001, China.
4. China Railway Tunnel Group Co., Ltd., Guangzhou 511458, Guangdong, China.
Abstract Acoustic emission (AE) source localization is a fundamental element of rock fracture damage imaging. To improve the efficiency and accuracy of AE source localization, this paper proposes a joint method comprising a three-dimensional (3D) AE source localization simplex method and grid search scanning. Using the concept of the geometry of simplexes, tetrahedral iterations were first conducted to narrow down the suspected source region. This is followed by a process of meshing the region and node searching to scan for optimal solutions, until the source location is determined. The resulting algorithm was tested using the artificial excitation source localization and uniaxial compression tests, after which the localization results were compared with the simplex and exhaustive methods. The results revealed that the localization obtained using the proposed method is more stable and can be effectively avoided compared with the simplex localization method. Furthermore, compared with the global scanning method, the proposed method is more efficient, with an average time of 10%–20% of the global scanning localization algorithm. Thus, the proposed algorithm is of great significance for laboratory research focused on locating rupture damages sustained by large-sized rock masses or test blocks.
Fund: This research is supported by the Natural Science Foundation of Henan Province (No. 222300420596);China Railway Science and Technology Innovation Program Funded Project (CZ02-Special-03); Science and Technology Innovation Project funded by China Railway Tunnel Group (Tunnel Research 2021-03);
Corresponding Authors: Wang Haonan(Email: WangHaonan9814@163.com).
E-mail: WangHaonan9814@163.com
About author: Author Biography: Liu Weijian (1977-), Male, Heze city, Shandong Province, Associate Professor, PhD, His research interests include Rock mechanics, Prevention and control of rockburst, Consolidation and water stopping of fractured rock mass,Microseismic monitoring.
E-mail:liuweijian803@163.com;
Cite this article:
. Study on Joint Method of 3D Acoustic Emission Source Localization Simplex and Grid Search Scanning[J]. APPLIED GEOPHYSICS, 2024, 21(3): 456-467.
2024, Vol. 21 
