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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：光电工程与仪器科学学院副院长
其他任职：Faculty director of Instrumentation Science
性别：男
毕业院校：日本富山大学
学位：博士
所在单位：光电工程与仪器科学学院
学科：微电子学与固体电子学. 测试计量技术及仪器
办公地点：研究生教育大楼 708
联系方式：chen_xm@dlut.edu.cn 0411-84706660
电子邮箱：chen_xm@dlut.edu.cn
Finite element approach analysis for characteristics of electromagnetic acoustic Lamb wave
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论文类型：会议论文
发表时间：2016-03-21
收录刊物：EI、CPCI-S、Scopus
卷号：9804
关键字：nondestructive testing; Lamb wave; finite element; EMAT
摘要：The electromagnetic acoustic Lamb wave, with the advantages of quickly detecting the defect and sensitivity to the defects, is widely used in non-destructive testing of thin sheet. In this paper, the directivity of sound field, Phase velocity, group velocity and particle displacement amplitude of Lamb wave are study based on finite element analysis method. The results show that, for 1mm aluminum, when the excitation frequency 0.64MHz, the displacement amplitude of A0 mode is minimum, and the displacement amplitude S0 mode is largest. Appropriate to increase the displacement amplitude of a mode, while reducing displacement amplitude of another mode, to achieve the excitation of a single mode Lamb wave. It is helpful to the Optimization of transducer parameters, the choice of Lamb wave modes and providing optimal excitation frequency.