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首页> 外文会议>Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US) >EXPERIMENTAL STUDY ON HIDDEN CORROSION/DELAMINATION DETECTION WITH ULTRASONIC GUIDED WAVES
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EXPERIMENTAL STUDY ON HIDDEN CORROSION/DELAMINATION DETECTION WITH ULTRASONIC GUIDED WAVES

机译：超声波引导波在隐蔽腐蚀/脱层检测中的实验研究

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摘要

Ultrasonic guided wave techniques are global nondestructive testing methods in nature and can provide broad possibilities of mode control and feature selection. When guided waves propagate in structures with corrosion defects, many phenomena, such as mode cutoff and conversion, group velocity changes, mode frequency shifts, and transmission and reflection amplitude ratios, etal, can be observed and used to detect hidden corrosion/delamination in the structures. However, for different problems, specific selection and optimization should be made to obtain the most obvious useful features. For the interface corrosion/delamination problems, effective theoretical and numerical methods should be developed to explain the experimental phenomena, while the experimental techniques used here for the artificial interface corrosion/delamination need to be verified for the practical interface corrosion/delamination situations.
机译：超声波导波技术实际上是全球无损检测方法，可以提供模式控制和功能选择的广泛可能性。当导波在具有腐蚀缺陷的结构中传播时，可以观察到许多现象，例如模态截止和转换，群速度变化，模态频率偏移以及透射和反射振幅比等，并用于检测管道中隐藏的腐蚀/分层。结构。但是，对于不同的问题，应进行特定的选择和优化以获得最明显的有用功能。对于界面腐蚀/分层问题，应该开发有效的理论和数值方法来解释实验现象，而此处用于人工界面腐蚀/分层的实验技术需要针对实际的界面腐蚀/分层情况进行验证。

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