Guided Wave Inspection and Monitoring of Railway Track
Guided Wave Inspection and Monitoring of Railway Track
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DOI：
10.1007/s10921-012-0145-9
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发表时间：
2012-12-01
影响因子：
2.8
通讯作者：
Loveday, Philip W.
中科院分区：
文献类型：
--
作者：
Loveday, Philip W.
对世界各地的老化铁路轨道进行具有成本效益的无损检测仍然是社会面临的挑战。连续焊接的钢轨在张力下安装，但如果初始张力不足，温度变化可能导致钢轨弯曲，或者如果初始张力过大，则可能导致疲劳裂纹并最终导致钢轨断裂。因此，无损检测的挑战包括缺陷检测和轴向应力测量。由于连续焊接的铁路线可以被认为是一维弹性波导，它们是导波超声的自然候选者，这提供了从单个位置询问大长度的轨道的可能性。导波已经被提出作为检测钢轨中的轴向应力以防止屈曲的手段，并且还作为检测完全断裂和断裂之前的裂纹的手段。本文回顾了所使用的方法和建模方法，以支持无损检测和监测系统的发展。对未来系统的可能性也进行了讨论。
Cost-effective NDE of the vast length of aging railway track around the world remains a challenge for the community. Continuously welded rail is installed in tension but temperature changes can result in rail buckling if the initial tension is insufficient or fatigue cracks and ultimately rail breaks if the initial tension is excessive. The NDE challenge therefore includes both the detection of defects and the measurement of axial stress. Since continuously welded railway lines may be thought of as one-dimensional elastic waveguides, they are natural candidates for guided wave ultrasound, which offers the potential to interrogate a large length of rail from a single position. Guided waves have been proposed as a means of detecting the axial stress in rails to prevent buckling and also as a means of detecting complete breakage and cracks prior to breakage. This paper reviews the approaches used and the modeling methods available to support the development of nondestructive inspection and monitoring systems. Possibilities for future systems are also discussed.