10.14489/td.2020.12.pp.024-033

2020, 12 December

DOI: 10.14489/td.2020.12.pp.024-033

Antipov A. G., Markov A.A.
DEPENDENCE OF THE RAIL MFL TESTING DATA ON THE SPEED ACCORDING TO THE RESULTS OF COMPUTER SIMULATION AND EXPERIMENT
(pp. 24-33)

Abstract. Research of magnetic flux leakage signals of rail non-destructive testing in a wide range of scanning speeds is carried out. The results of three-dimensional computer simulation show significant changes in the distribution of the magnetic field in the depth of the rail at high motion speeds of the magnetizer. The appearance of low magnetization zones in the places most distant from the surface of the rail due to the influence of eddy currents is predicted. It is concluded that to detect defects that lie deep under the surface of the rail, magnetic sensors should be shifted towards the rear pole. The simulation results are in correct agreement with the results of experimental studies carried out on railway tracks at testing speeds up to 60 km/h. The effect of the formation at high scanning speeds of a tail magnetic flux behind the rear pole of the magnetizer is considered. Registration of this flux leakage data is promising from the point of view of detecting deep-seated defects, as well as separating signals from surface and internal flaws at high inspection speeds.

Keywords: Magnetic Flux Leakage, high-speed rail inspection, magnetizer, magnetodynamic effects, tail field.

+ - About the Authors Click to collapse

A. G. Antipov, A. A. Markov (Radioavionica Corp., Saint-Petersburg, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Gorkunov E. S. (2014). Various states of remanent magnetization and their resistance to external influences. On the question of the "Method of magnetic memory". Defektoskopiya, (11), pp. 3 – 21. [in Russian language]
2. Antipov A. G., Markov A. A. (2016). Comparative analysis of active and residual magnetization methods in rail flaw detection. Defektoskopiya, (3), pp. 35 – 42. [in Russian language]
3. Antipov A. G., Markov A. A. (2019). Detection of defects in rails by the magnetic method. Defektoskopiya, (4), pp. 21 – 29. [in Russian language]
4. Wang P., Gao Y., Tian G. Y., Wang H. (2014). Velocity effect analysis of dynamic magnetization in high speed magnetic flux leakage inspection. NDT&E International, Vol. 64, pp. 7 – 12.
5. Li Y., Tian G. Y., Ward S. (2006). Numerical simulation on magnetic flux leakage evaluation at high speed. NDT&E International, Vol. 39, pp. 367 – 373.
6. Chen Z., Xuan J., Wang P. et al. (2011). Simulation on High Speed Rail Magnetic Flux Leakage Inspection. Proceedings of the IEEE International Instrumentation and Measurement Technology Conference, pp. 760 – 764.
7. Li Y., Wilson J., Tian G. Y. (2007). Experiment and simulation study of 3D magnetic field sensing for magnetic flux leakage defect characterization. NDT&E International, Vol. 40, pp. 179 – 184.
8. Markov A. A., Antipov A. G. (2016). Possibilities of the magnetodynamic method of rail flaw detection. Kontrol'. Diagnostika, (6), pp. 36 – 45. [in Russian language] DOI: 10.14489/td.2016.06.pp.036-045
9. Antipov A. G., Markov A. A. (2019). Method for high-speed magnetic flaw detection of long objects. Invention Patent No. 2707977. Russian Federation. [in Russian language]
10. Feng B., Kang Y., Sun Y. et al. (2016). Influence of motion induced eddy current on the magnetization of steel pipe and MFL signal. International Journal of Applied Electromagnetics and Mechanics, Vol. 52, pp. 357 – 362.

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