文献类型：期刊文献

英文题名：Excitation of a fundamental shear horizontal wave using a line source

作者：Liao, Z.Y.[1]; Cai, X.T.[1]; Tu, Y.[1]; Jia, J.H.[1]; Tu, S.T.[1]

机构：[1] Key Laboratory of Pressure Systems and Safety, School of Mechanical and Power Engineering, East China University of Science and Technology, Ministry of Education, Shanghai, China

年份：2018

起止页码：470

外文期刊名：Proceedings of the 7th Asia-Pacific Workshop on Structural Health Monitoring, APWSHM 2018

收录：EI(收录号：20191706837234)

语种：英文

外文关键词：Nondestructive examination - Waveguides - Aspect ratio - Structural health monitoring - Efficiency - Plates (structural components) - Shear flow

摘要：The fundamental shear horizontal (SHO) wave is more and more attractive in the nondestructive testing and structural health monitoring. It is potentially useful in a waveguide bar system to monitor the components working in harsh environment due to its special propagating characteristics. Because the shear horizontal waves normally exists in plates, and the waveguide bars of rectangular cross-section are typical plate-like structures, the waveguide bars of rectangular cross-section are preferred in the waveguide bar system. The rectangular cross-section waveguide bars with large aspect ratios can be considered as line sources. In order to excite pure SH0 wave for specimens, the excitation characteristics of all line sources are investigated and the anti-plane shear line source is selected as the premium loading firstly. And then the matching mechanism of the excitation source and the waveguide source is investigated. Moreover, the transmission efficiency of SH0 wave in the waveguide bar system is analyzed. At last a waveguide bar system is designed and experiments are carried out, and the experimental curve of transmission efficiency agrees quite well with the simulation one. Therefore, the reliability of excitation mechanism for SH0 wave has been validate. The research provides necessary methodology for the design of waveguide bar systems to excite the SHO wave. ? APWSHM 2018. All rights reserved.