重庆大学学报2016，Vol.39Issue(6)：71-77,7.DOI:10.11835/j.issn.1000-582X.2016.06.009
铝板材电磁超声兰姆波换能器的有限元分析及优化设计
Finite element analysis and optimal design of Lamb wave EMATs for aluminum plate
摘要
Abstract
The electromagnetic acoustic transducers (EMATs)possess the capability of generating Lamb waves.The waves manifest the characteristics of multi-mode,dispersion and weak singal,which limit the development and application of EMATs.To enhance the signal of Lamb wave EMATs,we proposed an optimal design method.By adding super-microcrystals between the permanent magnets and the coils,the eddy current in the surface of the permanent magnet was reduced and the eddy current in the specimen was increased.Meanwhile,the distribution of the static magnetic field was improved,and the signal intensity in the aluminum plate was enhanced.In this paper,the effect of ultra crystallite on electromagnetic ultrasonic signal was mainly studied.The finite element software was used to simulate and analyze the experiment.The experimental results show that the method can effectively enhance the intensity of Lamb wave signal.关键词
电磁超声兰姆波换能器/多模式/频散/超微晶Key words
Lamb wave electromagnetic acoustic transducer (EMAT)/multi-modes/dispersion pheno-menon/ultracrystallite分类
信息技术与安全科学引用本文复制引用
刘素贞,张严伟,霍丹,张闯,蔡智超,杨庆新..铝板材电磁超声兰姆波换能器的有限元分析及优化设计[J].重庆大学学报,2016,39(6):71-77,7.基金项目
国家自然科学基金（51307043）和河北省自然科学基金（E2016202260）资助项目。Supported by the National Natural Science Foundation of China （51307043）and the Hebei Provincial Natural Science Fundation （E2016202260）． （）
