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论文类型：期刊论文

发表时间：2013-04-23

发表刊物：Applied Mechanics and Materials

收录刊物：EI、CPCI-S、Scopus

卷号：333-335

页面范围：1713-1718

ISSN号：9783037857502

关键字：Dispersion characteristics; Guided wave; Lamb waves; Electromagnetic ultrasonic; Nondestructive testing

摘要：Electromagnetic ultrasonic nondestructive testing technology, which it have the advantages of withstand high temperature and without coupling agent, is widely used in Nondestructive Testing (NDT) field. To effectively detect the defects, the dispersion characteristics and multimode of guided waves in the plate are studied by the disperse simulation software, and the variation of dispersion curve is analyzed by the geometric parameters and materials of plate. The results showed that the dispersion characteristics of guided wave in the plate is depended on the thickness and material of plate, and dispersion and the multimode characteristics of plate are better at low frequencies and smaller thickness. This is helpful to selection of Electromagnetic acoustic transducer (EMAT) parameter and detection operating point of guided wave.