Study on Joint Method of 3D Acoustic Emission Source Localization Simplex and Grid Search Scanning  

三维声发射震源定位单纯形和网格搜索扫描联合方法研究

作　　者：Liu Wei-jian Wang Hao-nan Xiao Yang Hou Meng-jie Dong Sen-sen Zhang Zhi-zeng Lu Gao-ming 刘伟建;王浩楠;肖扬;侯梦杰;董森森;张志增;卢高明(中原工学院建筑工程学院,河南郑州451100;安岩智能科技(常州)有限公司,江苏常州213000;盾构及掘进技术国家重点实验室,河南郑州450001;中铁隧道局集团有限公司,广东广州511458)

机构地区：[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

出　　处：《Applied Geophysics》2024年第3期456-467,617,共13页应用地球物理（英文版）

基　　金：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)。

摘　　要：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.声发射震源定位是进行岩体破裂损伤成像的基础内容之一。为了提高声发射震源定位的效率和精度,本文提出三维声发射震源定位单纯形法和网格搜索扫描联合方法。基于单纯形的几何原理,首先进行四面体迭代缩小疑似震源区域的范围,其次对该区域进行网格划分和节点搜索扫描最优解,最后确定震源位置。采用人工激发震源定位试验和单轴压缩试验对该算法进行检验,其定位结果与单纯形法及全局扫描法进行对比,结果表明:本文提出的算法与单纯形定位方法相比较,定位结果更稳定,同时可以有效避免定位结果陷入局部极值;与全局扫描法相比较,该方法更高效,平均用时是全局扫描定位算法的10%-20%。该算法对实验室研究大尺寸岩体或试块的破裂损伤定位具有重要意义。

关 键 词：acoustic emission simplex form grid search scan locating the epicenter 

分 类 号：P631.4[天文地球—地质矿产勘探] TU45[天文地球—地质学]