金属小径管外壁裂纹的内检式电磁超声导波检测
Evaluation of external cracks in small-diameter metallic tubes via bobbin-typedguided-wave electromagnetic acoustic transduction
摘 要
探究了基于内检式电磁超声导波检测的金属小径管外壁裂纹定量评估方法。基于三维有限元仿真，在确定激励中心频率和激励波形的基础上，对金属小径管的超声导波检测进行数值仿真，通过改变裂纹缺陷的长度和径向深度，分析并获取检测信号对外壁裂纹的响应特性及规律。同时，搭建管件电磁超声导波检测试验平台，获取管件不同尺寸缺陷的电磁超声导波检测响应信号。试验结果表明，管件外壁裂纹深度越深，检测信号中的缺陷回波面积越大，内检式电磁超声导波可有效对金属小径管外壁裂纹进行定量检测。
金属小径管
缺陷特征
定量评估
guided-wave electromagnetic acoustic transduction
small-diameter metallic tube
defect characteristics
quantitative evaluation
Abstract
The bobbin-typed guided-wave electromagnetic acoustic transduction (GW-EMAT) is intensively investigated for detection and assessment of external cracks in small-diameter metallic tubes (SMTs). Based on 3D finite element analysis, the central frequency and waveform of the GW-EMAT excitation are sought. Series of simulations regarding GW-EMAT inspection of SMT have been conducted. The characteristics and relation of the signal response to the external crack are obtained and analyzed by changing the circumferential length and radial depth of the crack. Meanwhile, a GW-EMAT testing system is built up. The experimental signals of cracks in different sizes are acquired and scrutinized. From the investigation results, it can be found that the area of the crack echo increases as the crack depth rises, indicating the feasibility of bobbin-typed GW-EMAT for detecting and evaluating the external cracks in SMTs.
中图分类号 TG115.28 DOI 10.11973/wsjc202210001
所属栏目 无损检测新技术发展与应用专题
基金项目 国家磁约束核聚变能发展研究专项（2019YFE03130003）；国家自然科学基金项目（51777149，11927801）；国家重点研发项目（2017YFF0209703）
收稿日期 2022/3/1
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备注李孟奇(1998-),男,硕士研究生,主要研究方向为电磁超声导波检测
引用该论文: LI Mengqi,LI Yong,SU Bingjie,LIU Tianhao,PEI Cuixiang,CHEN Zhenmao. Evaluation of external cracks in small-diameter metallic tubes via bobbin-typedguided-wave electromagnetic acoustic transduction[J]. Nondestructive Testing, 2022, 44(10): 1～5
李孟奇,李勇,苏冰洁,刘天浩,裴翠祥,陈振茂. 金属小径管外壁裂纹的内检式电磁超声导波检测[J]. 无损检测, 2022, 44(10): 1～5
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【3】许西宁, 郭保青, 余祖俊, 等.半解析有限元法求解钢轨中超声导波频散曲线[J].仪器仪表学报, 2014, 35(10):2392-2398.
【4】朱力强, 许西宁, 余祖俊, 等.基于超声导波的钢轨完整性检测方法研究[J].仪器仪表学报, 2016, 37(7):1603-1609.
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【6】DEMMA A, CAWLEY P, LOWE M.Scattering of the fundamental shear horizontal mode from steps and notches in plates[J].The Journal of the Acoustical Society of America, 2003, 113(4 Pt 1):1880-1891.
【7】DEMMA A, CAWLEY P, LOWE M, et al.The reflection of guided waves from notches in pipes:a guide for interpreting corrosion measurements[J].NDT & E International, 2004, 37(3):167-180.
【8】HAYASHI T, KAWASHIMA K, SUN Z Q, et al.Guided wave propagation mechanics across a pipe elbow[J].Journal of Pressure Vessel Technology, 2005, 127(3):322-327.
【9】武静, 张伟伟, 聂振华, 等.基于Lyapunov指数的管道超声导波小缺陷定位实验研究[J].振动与冲击, 2016, 35(1):40-45, 53.
【10】王伟, 游鹏辉, 钟力强, 等.基于T(0, 1)扭转波的管道纵向裂纹定位方法[J].中国测试, 2016, 42(6):139-144.
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