| 铝板材电磁超声兰姆波换能器的有限元分析及优化设计 |
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| 引用本文： | 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].保鲜与加工,2016(6):71-77. |
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| 作者姓名： | 刘素贞 张严伟 霍丹 张闯 蔡智超 杨庆新 |
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| 作者单位： | 河北工业大学 电磁场与电器可靠性省部共建实验室, 天津 300130,河北工业大学 电磁场与电器可靠性省部共建实验室, 天津 300130,河北工业大学 电磁场与电器可靠性省部共建实验室, 天津 300130,河北工业大学 电磁场与电器可靠性省部共建实验室, 天津 300130,河北工业大学 电磁场与电器可靠性省部共建实验室, 天津 300130,河北工业大学 电磁场与电器可靠性省部共建实验室, 天津 300130;天津工业大学 电工电能新技术天津市重点实验室, 天津 300387 |
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| 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。 |
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| 摘 要： | 电磁超声兰姆波换能器由于其激发的兰姆波具有多模式、频散性和信号较弱的特点，在一定程度上限制了其发展及应用。针对增强电磁超声兰姆波信号强度问题，提出了一种优化设计方法。通过在永磁铁和线圈之间加入超微晶叠片来减小永磁铁表面的涡流，增加试件中的涡流，同时改善静磁场的分布，从而增强铝板中的信号强度。重点研究了超微晶对电磁超声信号的影响，采用有限元软件进行仿真分析，并进行了实验验证。实验结果表明，该优化方法能够有效增强兰姆波信号强度。
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| 关 键 词： | 电磁超声兰姆波换能器 多模式 频散 超微晶 |
| 收稿时间： | 2016/7/5 0:00:00 |
Finite element analysis and optimal design of Lamb wave EMATs for aluminum plate |
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| LIU Suzhen,ZHANG Yanwei,HUO Dan,ZHANG Chuang,CAI Zhichao and YANG Qingxin.Finite element analysis and optimal design of Lamb wave EMATs for aluminum plate[J].Storage & Process,2016(6):71-77. |
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| Authors: | LIU Suzhen ZHANG Yanwei HUO Dan ZHANG Chuang CAI Zhichao and YANG Qingxin |
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| Institution: | Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, P. R. China,Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, P. R. China,Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, P. R. China,Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, P. R. China,Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, P. R. China and Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, P. R. China;Key Laboratory of Advanced Electrical Engineering and Energy Technology, Tianjin Polytechnic University, Tianjin 300387, P. R. China |
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| 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. |
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| Keywords: | Lamb wave electromagnetic acoustic transducer (EMAT) multi-modes dispersion pheno-menon ultracrystallite |
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