The Influence of Electromagnetic Acoustic Transducer Loading Way on the Mode of Lamb Wave
Liu Suzhen1,2, Dong Shuo1,2, Zhang Chuang1,2, Jin Liang3, Yang Qingxin1,2,3
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 TechnologyTianjin Polytechnic University Tianjin 300387 China
Abstract：Lamb waves are widely used in the field of nondestructive testing with the advantage of better directivity, higher detection efficiency and longer propagation distance etc. But there are always two or more modes existing at any frequency when Lamb waves are generated, and the propagation velocity of each mode is different, which makes the received echoes very complex, so the defect is difficult to be distinguished by analyzing the defect echoes. In this paper, based on multimode characteristics of lamb waves, the influence of electromagnetic acoustic excitation way on the lamb wave mode is researched, and lamb wave-mode control is achieved by choosing the loading way of electromagnetic acoustic transducer (EMAT), which improves excitation efficiency of corresponding Lamb wave-mode and restrains other modes, thereby reducing the difficulty of the subsequent signal processing, and providing useful information for identifying and locating defects in actual detection.
刘素贞, 董硕, 张闯, 金亮, 杨庆新. 电磁超声加载方式对Lamb波模态的影响[J]. 电工技术学报, 2018, 33(19): 4426-4433.
Liu Suzhen, Dong Shuo, Zhang Chuang, Jin Liang, Yang Qingxin. The Influence of Electromagnetic Acoustic Transducer Loading Way on the Mode of Lamb Wave. Transactions of China Electrotechnical Society, 2018, 33(19): 4426-4433.
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2018, Vol. 33 
