Simulation Analysis of Electromagnetic AcousticSurface Wave of Steel Plate and Quantitative Defect Detection

被引：0
|
作者：
Liu S. [1 ,2 ]
Wang S. [1 ,2 ]
Zhang C. [1 ,2 ]
Jin L. [3 ]
Yang Q. [1 ]
机构：
[1] State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin
[2] Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin
[3] Key Laboratory of Advanced Electrical Engineering and Energy Technology, Tianjin Polytechnic University, Tianjin
来源：
Liu, Suzhen (szliu@hebut.edu.cn) | 1600年 / China Machine Press卷 / 35期
关键词：
Electromagnetic acoustic transducer; Ferromagnetic materials; Magnetostrictive force; Quantitative defect detection; Surfacewave;
D O I：
10.19595/j.cnki.1000-6753.tces.181586
中图分类号：
学科分类号：
摘要：
The transduction mechanism of electromagnetic acoustic transducer (EMAT) is closely related to the electromagnetic properties of the material being tested. EMAT responds differently to the different electrical and magnetic properties of the test materials. The electromagnetic acoustic transduction mechanism of ferromagnetic materials is complicated because of its magnetostriction effect and nonlinear magnetization characteristic. Based on the constitutive equation of ferromagnetic materials, electromagnetic acoustic transducerfinite element model of steel plate with rectangular flaw was established, considering lorentz force, magnetostriction effect and magnetization force simultaneously. The response characteristics of surface waves to steel defects are simulated and analyzed. The relationships between the flaw size, depth and the amplitude of the reflection and transmission waves were obtained, which laid a foundation for quantitative test of steel plate crack defects. Finally, experiments detecting the standard specimen with different depth defects were conducted to vertify the result of simulation analysis. © 2020, Electrical Technology Press Co. Ltd. All right reserved.
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页码：97 / 105
页数：8
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