Development of algorithm for calculating dynamic processes of railroad track deformability work

Authors

  • Iryna Bondarenko Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan Lazaryan str., 2, Dnipro, Ukraine, 49010, Ukraine https://orcid.org/0000-0003-4717-3032

DOI:

https://doi.org/10.15587/1729-4061.2016.85464

Keywords:

dynamic load, amplitude of oscillations, excitation frequency by force pulse, oscillations propagation

Abstract

A creation of algorithm for the calculation of dynamic processes of the track deformability is highlighted. It is a method for the description of transfer of impact of the rolling stock on the track. It is proposed, as a dynamic influence of the rolling stock on the track, to consider a parametric impact of the pulses that act in the point of contact between rails and wheels and propagate maintaining the properties of elastic waves. Characteristic features of the algorithm are the application of principles of the theory of wave propagation in solid materials. Due to these peculiarities, the possibility is provided for the determination of a wave front at a non-stationary wave process that occurs when the source of oscillations moves in a motionless environment and possesses the Doppler Effect with its registration in the experiments. We took into account that the special features of the transfer of dynamic load are:

– the period of load action on the track that defines the frequency of pulse oscillation that is transferred to the track design;

– variable directivity of the oscillation pulse over time, which is predetermined by changes in mode, polarization and waves shape at propagation. This allows us: to obtain spatial parameters of propagation of the process of deformability in the track design; to predict the change in the stressed-strained state of the elements of design and the design itself depending on the characteristics of materials and structure elements of the track design; to solve problems about the interaction between the contacting surfaces at the propagation of loads with regard to relations between the amplitudes of oscillations in the transition of waves from one element to another one.

Thus, our research demonstrated the possibility of directed regulation of the process of deformability of a railroad track by changing the characteristics of materials and design of the elements of a railroad track.

The algorithm presented complements the research on modeling for the purpose of establishing assessment of conditions of functional safety of a railroad track. Based on the developed algorithm, further studies may be conducted for determining the mechanical performance of elements of the track and the track design itself from the influence of the rolling stock for the purpose of evaluating and predicting the terms of operation of the elements and design of the track.

Author Biography

Iryna Bondarenko, Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan Lazaryan str., 2, Dnipro, Ukraine, 49010

PhD, Associate Professor

Department "Track and track facilities"

References

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Published

2016-12-22

How to Cite

Bondarenko, I. (2016). Development of algorithm for calculating dynamic processes of railroad track deformability work. Eastern-European Journal of Enterprise Technologies, 6(7 (84), 28–36. https://doi.org/10.15587/1729-4061.2016.85464

Issue

Vol. 6 No. 7 (84) (2016): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2016 Iryna Bondarenko

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