Radar analysis of free oscillations of rail for diagnostics defects

Shaydurov, G. Y.; Kudinov, D. S.; Kokhonkova, E. A.; Potylitsyn, V. S.

doi:10.1088/1742-6596/1015/3/032182

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Here we will try to assess the change in frequency depending on the linear dimensions of the defects in the standard rail of the brand R65. For the calculation we use the formulas given in [6]. Here we estimate only its influence on the shift of the resonant frequencies by the example of a rod fixed at both ends.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Development of a Digital Radar Flaw Detector for Robotic Defect Detection Systems

Potylitsyn

Kokhonkova

Romanov

2019

2019 International Siberian Conference on Control and Communications (SIBCON)

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The purpose of this study is to develop a software and hardware complex for robotic defect detection systems, which will reduce the measurement time and reduce labor costs. The main method of detecting defects in this article is the registration of the effect of a change in the resonant frequency of oscillations of rail lashes due to the formation of defects. Simulation and evaluation of the effect of linear dimensions of defects for a regular cylinder and a sphere is given. It is shown that even defects with sizes up to 1 mm give frequency shifts for the first harmonic up to 10 Hz, and also data are given on the formation of additional oscillatory modes from the position of the defect relative to the edges of the rail lash. The second part of the article contains materials on the development of software and hardware for recording vibration data by a radar method Keywords-robotic system, radar method, defectoscopy, railway rails, frequency of free oscillations, acoustic waves.

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Section: Introductionmentioning

confidence: 99%

Analysis and Development of a Digital Radar Flaw Detector for Robotic Defect Detection Systems

Potylitsyn

Kokhonkova

Romanov

2019

2019 International Siberian Conference on Control and Communications (SIBCON)

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“…Размеры дефекта тоже в свою очередь влияют на частотный сдвиг ∆f, а также добавляют частотные гармоники, обусловленные образовением дополнительных стоячих волн. В наших ранних работах мы уже публиковали данные при дефекте типа "трещина"[7]. Принцип выявления дефекта путем регистрации дополнительных колебательных мод в спектре собственных колебаний рельсовFig.…”

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Investigation of the Influence of a Cavity Type Defect on the Frequencies of the Natural Rail Oscillations by the Radar Method

Potylitsyn

Kudinov

Kokhonkova

2019

Journal of Siberian Federal University. Engineering &Amp; Technologies

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Currently, the problem of non-destructive testing of rail lashes or rolling stock is quite acute, as the demands of both speed characteristics and vehicle safety increase every year. Thus, the purpose of this study was to determine the possibility of recording frequencies of natural oscillations by the radar method for rail lashes and the influence of the dimensions of the cavity-type defect. For this purpose, a laboratory bench was created with a standard rail, the length of 1.19 m of the P-65 brand, in which free oscillations were excited using a shock impulse load. Measurements of natural oscillation frequencies of the rail were recorded on a 24-bit ADC and a specialized accelerometer ZETLAB BC110. To register the oscillations, a Doppler radar with a frequency of 10 GHz was used, which was installed at the focus of a parabolic mirror offset antenna with a 1.6-meter diameter. It was found that a “field” defect shifts the frequency mode of oscillation 750 Hz upwards. It is shown that the hole in the rail neck with a diameter of 10 mm makes a change in the frequency of about 14 Hz

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Radar analysis of free oscillations of rail for diagnostics defects

Cited by 2 publications

References 4 publications

Analysis and Development of a Digital Radar Flaw Detector for Robotic Defect Detection Systems

Analysis and Development of a Digital Radar Flaw Detector for Robotic Defect Detection Systems

Investigation of the Influence of a Cavity Type Defect on the Frequencies of the Natural Rail Oscillations by the Radar Method

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