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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >A finite element analysis of the time-delay periodic ring arraysfor guided wave generation and reception in hollow cylinders
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A finite element analysis of the time-delay periodic ring arraysfor guided wave generation and reception in hollow cylinders

机译：空心圆柱体中导波产生和接收的时滞周期环阵列的有限元分析

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摘要

A new guided wave transducer model, time-delay periodic ringnarrays (TDPRAs), is proposed and investigated in this paper for guidedncylindrical wave generation and reception in hollow cylinders withnapplication interests focusing on non-destructive testing (NDT) ofnpiping/tubing. A finite element simulation has been performed fornaxisymmetric guided-mode excitation and reception with TDPRAs. Bynarranging a proper configuration of the time-delay profile and thenelectric-connection pattern of a ring array, unidirectional excitationnand reception of guided waves can be achieved. The numerical results arenobtained for the first three axisymmetrical modes and are compared withnrespect to generation efficiency and mode selectivity. Parametricninfluences on the performance of TDPRAs are discussed, combining a 2-Dnphase velocity-frequency spectrum approach with the mode dispersion andndisplacement structure analyses. The identification of converted modesnin guided cylindrical wave reflections with a flexible TDPRA receivernhas also been studied through sample notch reflection
机译：提出并研究了一种新型的导波换能器模型-时延周期环形阵列（TDPRA），用于中空圆柱体中导频柱形波的产生和接收，其应用兴趣集中在管道/管道的无损检测（NDT）上。用TDPRA对轴对称制导模式的激励和接收进行了有限元模拟。通过安排时延曲线的适当配置，然后排列环形阵列的电连接模式，可以实现单向激励和导波的接收。没有获得前三个轴对称模式的数值结果，并就发电效率和模式选择性进行了比较。讨论了对TDPRAs性能的参数影响，将2-Dnphase速度-频谱方法与模式色散和n位移结构分析相结合。还通过样本陷波反射研究了利用柔性TDPRA接收器识别导波变换的圆柱波反射的模态。

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