International Journal of Mining Science and Technology ( IF 11.8 ) Pub Date : 2022-01-31 , DOI: 10.1016/j.ijmst.2022.01.002 Longjun Dong 1 , Qing Tao 1 , Qingchun Hu 1 , Sijia Deng 1 , Yongchao Chen 1 , Qiaomu Luo 1 , Xihong Zhang 2
Acoustic emission (AE) localization plays an important role in the prediction and control of potential hazardous sources in complex structures. However, existing location methods have less discussion on the presence of unknown empty areas. This paper proposes an AE source location method for structures containing unknown empty areas (SUEA). Firstly, this method identifies the shape, size, and location of empty areas in the unknown region by exciting the active AE sources and using the collected AE arrivals. Then, the unknown AE source can be located considering the identified empty areas. The lead break experiments were performed to verify the effectiveness and accuracy of the proposed method. Five specimens were selected containing empty areas with different positions, shapes, and sizes. Results show the average location accuracy of the SUEA increased by 78% compared to the results of the existing method. It can provide a more accurate solution for locating AE sources in complex structures containing unknown empty areas such as tunnels, bridges, railroads, and caves in practical engineering.
中文翻译:
含未知空区结构的声发射源定位方法及实验验证
声发射(AE)定位在复杂结构中潜在危险源的预测和控制中发挥着重要作用。然而,现有的定位方法对未知空白区域的存在的讨论较少。本文提出了一种用于包含未知空白区域(SUEA)的结构的声源定位方法。首先,该方法通过激发有源声发射源并使用收集到的声发射到达来识别未知区域中空白区域的形状、大小和位置。然后,考虑到已识别的空白区域,可以定位未知的 AE 源。为了验证所提方法的有效性和准确性,进行了断线实验。选择了五个包含不同位置、形状和大小的空白区域的样本。结果表明,与现有方法的结果相比,SUEA 的平均定位精度提高了 78%。它可以为实际工程中的隧道、桥梁、铁路、洞穴等包含未知空白区域的复杂结构中的声发射源定位提供更准确的解决方案。