Simulation Analysis of EMAT Shear Wave in Pipeline and Research of Defect Detection Characteristics

2021 3rd International Conference on Intelligent Control, Measurement and Signal Processing and Intelligent Oil Field (ICMSP) Pub Date : 2021-07-23 DOI:10.1109/ICMSP53480.2021.9513224

Jie Wu, Chiyu Wang

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Abstract

According to the principle of electromagnetic Acoustic transducer (EMAT), the propagation characteristics of electromagnetic ultrasonic shear wave in pipeline are analyzed by using the finite element analysis software COMSOL. Based on the study of the acoustic field characteristics of the ultrasonic shear wave, a finite element model with bubble defects was established, and the ultrasonic response characteristics of the inner and outer walls of the pipe with defects were simulated and analyzed, and compared with those of the pipe without defects. Then the simulation analysis of the defects of different sizes and different positions is carried out, and the relationship between the size, position, defect echo, defect transmission wave and time is obtained, which lays a foundation for the quantitative and location monitoring of pipeline bubble defects. The possibility of electromagnetic ultrasonic body wave in oil pipeline flaw detection is verified.

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管道EMAT横波仿真分析及缺陷检测特性研究

根据电磁声换能器(EMAT)的工作原理，利用有限元分析软件COMSOL分析了电磁超声剪切波在管道中的传播特性。在研究超声剪切波声场特性的基础上，建立了含气泡缺陷的有限元模型，对含缺陷管道内外壁的超声响应特性进行了仿真分析，并与无缺陷管道进行了对比。然后对不同尺寸、不同位置的缺陷进行了仿真分析，得到了尺寸、位置、缺陷回波、缺陷透射波与时间的关系，为管道气泡缺陷的定量化和定位监测奠定了基础。验证了电磁超声体波在输油管道探伤中的可行性。

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2021 3rd International Conference on Intelligent Control, Measurement and Signal Processing and Intelligent Oil Field (ICMSP)

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