| SH导波在钢板缺陷检测中的传播特性 |
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| 引用本文： | 刘素贞,刘亚洲,张闯,金亮. SH导波在钢板缺陷检测中的传播特性[J]. 声学技术, 2017, 36(2): 140-146 |
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| 作者姓名： | 刘素贞 刘亚洲 张闯 金亮 |
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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,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）、河北省自然科学基金（E2016202260）、天津市自然科学基金（16JCYBJC19000）资助项目 |
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| 摘 要： | 水平剪切(Shear Horizontal,SH)导波在传播的过程中有对称模式和反对称模式,其相速度和群速度主要取决于试件的厚度和频率之积(频厚积)。利用COMSOL有限元分析软件,建立了钢板缺陷的3-D模型,仿真分析了SH0导波在钢板中的传播特性。仿真结果表明SH波在传播过程中很少发生波束方向的改变,无频散和模式转换,信噪比高。利用电磁超声方法激励SH波,对钢板中的裂纹和焊缝缺陷进行了实验,验证了仿真结果的正确性及可行性,为超声导波在板材缺陷检测中的应用提供基础。
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| 关 键 词： | 导波 频散 模式转换 传播特性 焊缝缺陷 |
| 收稿时间： | 2016-06-03 |
| 修稿时间： | 2016-09-10 |
Propagation characteristics of SH guided wave in steel plate defect detection |
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| LIU Su-zhen,LIU Ya-zhou,ZHANG Chuang and JIN Liang. Propagation characteristics of SH guided wave in steel plate defect detection[J]. Technical Acoustics, 2017, 36(2): 140-146 |
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| Authors: | LIU Su-zhen LIU Ya-zhou ZHANG Chuang JIN Liang |
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| Affiliation: | Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology, Tianjin 300130, China,Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology, Tianjin 300130, China,Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology, Tianjin 300130, China and Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University, Tianjin 300387, China |
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| Abstract: | Shear Horizontal (SH) wave has two modes in the process of transmission:symmetrical mode and antisymmetric mode, and its phase velocity and group velocity mainly depend on the product of thickness and frequency of specimen. The paper sets up a three-dimensional model for steel plate defects by using COMSOL finite element analysis software, simulates and analyzes the SH0 guided wave propagation characteristics in the steel plate, and concludes that shear horizontal wave has little change in the direction of beam, no dispersion and mode conversion, and high signal to noise ratio in the process of transmission. Meanwhile, we utilize the electromagnetic ultrasonic transducer to generate shear horizontal wave and make an experiment of the crack and weld defect in the steel to test the validity and feasibility of stimulation result, which will provide the basis for the application of ultrasonic guided waves in the plate defect detection. |
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| Keywords: | guided wave dispersion mode conversion propagation characteristics weld defects |
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