Simulation Analysis of Electromagnetic Acoustic Surface Wave of Steel Plate and Quantitative Defect Detection
Liu Suzhen1,2, Wang Shujuan1,2, Zhang Chuang1,2, Jin Liang3, Yang Qingxin1
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China; 2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology Tianjin 300130 China; 3. Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China
Abstract：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 transducer finite 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.
刘素贞, 王淑娟, 张闯, 金亮, 杨庆新. 钢板电磁超声表面波的仿真分析及缺陷定量检测[J]. 电工技术学报, 2020, 35(1): 97-105.
Liu Suzhen, Wang Shujuan, Zhang Chuang, Jin Liang, Yang Qingxin. Simulation Analysis of Electromagnetic Acoustic Surface Wave of Steel Plate and Quantitative Defect Detection. Transactions of China Electrotechnical Society, 2020, 35(1): 97-105.
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2020, Vol. 35 
