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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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摘要

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横截面波导(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。一种半解析有限元方法被描述为一种替代的但仍然健壮的方法来解决问题。所显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。

著录项

  • 来源
    《NDT & E international》 |2011年第1期|p.93-100|共8页
  • 作者单位

    University of California San Diego, Department of Structural Engineering, NDE & SHM Lab., 9500 Gilman Drive, La Joila, CA 92093-0085, USA;

    rnCivil, Architectural & Environmental Engineering, 3141 Chestnut St. Philadelphia, PA 19104, USA;

    rnUniversita degli Studi di Bologna, Dipartimento di Ingegneria delle Strutture, del Trasporti, delle Acque, del Rilevamento, del Territorio-DISTART, Viale Risorgimento 2,40136 BO, Italy;

    rnUniversity of California San Diego, Department of Structural Engineering, NDE & SHM Lab., 9500 Gilman Drive, La Joila, CA 92093-0085, USA;

    rnDepartment of Civil, Structural and Environmental Engineering University at Buffalo, 230 Ketter Hall, North Campus Buffalo, NY 14260, USA;

    rnFederal Railroad Administration, Office of Railroad Development, 1200 New Jersey Ave SE, MS-20 Washington, DC 20590, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    guided waves; rail defect detection; wave propagation; nondestructive testing;

    机译:导波铁路缺陷检测;波传播非破坏性测试;

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