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首页> 外文期刊>NDT & E International: Independent Nondestructive Testing and Evaluation >Numerical and experimental study of guided waves for detection of defects in the rail head
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Numerical and experimental study of guided waves for detection of defects in the rail head

机译：导波头检测缺陷的数值与实验研究

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This paper gives insight to the ultrasonic wave propagation in arbitrary cross-section waveguides such as rails, with application to ultrasonic inspection. Due to the geometrical complexity of the rail cross-section, the analytical solution to the wave propagation in the rail is not feasible. A Semi Analytical Finite Element method is described as an alternative yet still robust approach to get the solution of the problem. The free-vibration solution and the forced solution to a laser excitation of the rail head are shown up to a frequency of 500 kHz. The effects of different loading patterns are discussed, and experimental results are provided. The analysis allows for the identification of certain wave modes potentially sensitive to specific types of rail head defects.
机译：本文深入介绍了超声波在任意截面波导（如轨道）中的传播，并将其应用于超声检查。由于钢轨横截面的几何复杂性，对钢轨中波传播的解析解决方案不可行。半解析有限元方法被描述为一种替代的但仍然可靠的方法来解决问题。所示的自由振动解决方案和对轨头进行激光激励的强制解决方案的频率高达500 kHz。讨论了不同加载方式的影响，并提供了实验结果。该分析允许识别对特定类型的轨头缺陷潜在敏感的某些波模。

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