在空心圆筒中实现超声导波模态控制

2015 IEEE Far East NDT New Technology & Application Forum (FENDT) Pub Date : 2015-05-28 DOI:10.1109/FENDT.2015.7398315

Xiao-wei Zhang, Zhifeng Tang, Sujun Luo, L. Fuzai, Ye Han

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引用次数: 1

摘要

超声导波已成功地应用于各行业管道的无损检测和结构健康监测中。由于导波的色散特性和传播模式的无限大，导波是复杂的。模态控制对导波的应用具有重要意义。采用经典的法模展开(NME)方法，分别采用延时轴向阵列换能器和延时圆阵列换能器对空心圆柱体中的导波模控制进行了分析。通过对轴向阵换能器和圆阵换能器的特殊设计，可以实现导波模式控制。通过有限元数值计算验证了理论预测。

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Implementing ultrasonic guided wave mode control in hollow cylinders

Ultrasonic guided waves have been successfully applied in Non-Destructive Evaluation (NDE) and Structural Health Monitoring (SHM) of pipelines of various industries. Guided waves are complicated because of their dispersive nature and infinite number of propagating modes. Mode control is of great significance for application of guided waves. The classical Normal Mode Expansion (NME) method is adopted to analyze guided wave mode control in hollow cylinders by using time delay axial array transducers and time delay circular array transducers. Guided wave mode control can be implemented when the axial array transducers and circular array transducers are specially designed. The theoretical prediction is verified by finite element numerical evaluation.

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2015 IEEE Far East NDT New Technology & Application Forum (FENDT)

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