基于稀疏最小二乘支持向量回归的混凝土三维声发射源定位实验研究

IF 0.5 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
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引用次数: 0

摘要

为了进一步证明稀疏最小二乘支持向量回归(S-LS-SVR)方法在损伤检测中的有效性,采用S-LS-SVR模型对混凝土的实际损伤源进行定位。通过混凝土中钢筋的拉拔试验产生声发射试验数据并进行滤波,通过模型提供破坏过程中实时损伤源的三维坐标。将S-LS-SVR方法与牛顿迭代法和改进穷举法在定位速度、定位数据利用率和定位精度方面进行了比较。结果表明,S-LS-SVR在定位速度、定位数据利用率和定位精度方面均优于其他两种基于到达时差的定位方法(数据利用率略低于改进的穷穷方法)。基于S-LS-SVR的定位方法为声发射技术在桥梁、大坝等服役结构损伤智能定位中的应用提供了可能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental Study On 3D Acoustic Emission Source Location of Concrete Based On Sparse Least-Squares Support Vector Regression
In order to further prove the effectiveness of the sparse least-squares support vector regression (S-LS-SVR) method in damage detection, the authors used the S-LS-SVR model to locate actual damage sources of concrete. The data from acoustic emission testing (AE) are generated and filtered by the pullout test of reinforcement in concrete, and the three-dimensional coordinates of real-time damage sources in the failure process are provided through the model. The S-LS-SVR method is compared with the Newton iterative method and improved exhaustive method for positioning speed, positioning data utilization, and positioning accuracy. The results show that S-LS-SVR is superior to the two other time difference of arrival–based positioning methods in positioning speed, positioning data utilization, and positioning accuracy (data utilization is slightly lower than the improved exhaustive method). The location method based on S-LS-SVR provides the possibility for the application of AE technology in intelligent damage location of bridges, dams, and other service structures.
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来源期刊
Materials Evaluation
Materials Evaluation 工程技术-材料科学:表征与测试
CiteScore
0.90
自引率
16.70%
发文量
35
审稿时长
6-12 weeks
期刊介绍: Materials Evaluation publishes articles, news and features intended to increase the NDT practitioner’s knowledge of the science and technology involved in the field, bringing informative articles to the NDT public while highlighting the ongoing efforts of ASNT to fulfill its mission. M.E. is a peer-reviewed journal, relying on technicians and researchers to help grow and educate its members by providing relevant, cutting-edge and exclusive content containing technical details and discussions. The only periodical of its kind, M.E. is circulated to members and nonmember paid subscribers. The magazine is truly international in scope, with readers in over 90 nations. The journal’s history and archive reaches back to the earliest formative days of the Society.
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