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Analysis of the Parameters of Bottom Signals in the Area of Welded Joints of Rails under High-Speed Ultrasonic Testing

  • ACOUSTIC METHODS
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Abstract

This research is a continuation of the work aimed at analyzing the parameters of ultrasonic signals during high-speed rail inspection. The analysis of the behavior of the amplitudes of the sequences of bottom signals in the zone most problematic for the continuous-welded track, i.e., the zone of the welded joints of rails, has been carried out in a wide range of inspection speeds. It is shown that, starting from certain scanning speeds, in accordance with the current regulatory and technical documentation, many zones of welded joints can be attributed to unscanned areas. The research results can be used to optimize the designs of scanning systems for high-speed diagnostic systems and to substantiate permissible rail-track scanning speeds.

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Notes

  1. The crush is the result of the process of surface plastic deformation of the rail when interacting with the wheels of the rolling stock, which manifests itself in a gradual change in the shape and size of the rail. Intensive development of saddles in operation is facilitated by the presence of an initial unevenness in the welded joint formed during welding of rails with end curvature or the absence or violation of hardening heat treatment of welded joints.

  2. The highly defective rails (HDR) in contrast to the defective rails (DR) do not pose a direct threat to the train traffic and do not require immediate removal from the track.

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  1. OAO Radioavionika, 190005, St. Petersburg, Russia

    A. A. Markov & E. A. Maksimova

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  1. A. A. Markov
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  2. E. A. Maksimova
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Correspondence to A. A. Markov.

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Markov, A.A., Maksimova, E.A. Analysis of the Parameters of Bottom Signals in the Area of Welded Joints of Rails under High-Speed Ultrasonic Testing. Russ J Nondestruct Test 57, 383–392 (2021). https://doi.org/10.1134/S1061830921050107

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  • DOI: https://doi.org/10.1134/S1061830921050107

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