DETERMINING DEPENDENCE OF THE CHANGE IN NORMAL STRESSES IN RAIL ON ITS WEAR DEGREE
https://doi.org/10.30932/1992-3252-2019-17-5-38-56
Abstract
The safety of railway operation is associated with the stress state in rails, depending on the applied load (both vertical and lateral load) and on changes in the rail profile associated with wear.
The objective of this work is to obtain and describe the dependence of the edge stresses in a rail as a function of wear magnitude. The obtained dependence is used to determine the maximum stresses. The technique consists in constructing a spline approximation of a worn rail profile. The proposed approach allows simulating real rail wear (vertical and lateral wearing). The work has applied in MathCAD environment a practical algorithm for calculating the influence of the degree of rail wear on the increase in the maximum bending stresses and on decrease in permissible loads.
A technique has been developed for simulating the profile and calculating the normal contour stresses during rail bending, considering the wear magnitude. It is applied to the movement of a rail wheelset along the rail track in a straight section of the track. The technique also allows considering horizontal lateral force from the wheel flange during movement of various types of rolling stock in curved track sections. Calculations have been carried out and a nonlinear dependence of the growth of maximum compressive and tensile normal stresses on the degree of wear has been obtained. Three characteristic ranges have been identified and recommendations have been given for reducing the destructive load with regard to rail wear.
The objective of this work is to obtain and describe the dependence of the edge stresses in a rail as a function of wear magnitude. The obtained dependence is used to determine the maximum stresses. The technique consists in constructing a spline approximation of a worn rail profile. The proposed approach allows simulating real rail wear (vertical and lateral wearing). The work has applied in MathCAD environment a practical algorithm for calculating the influence of the degree of rail wear on the increase in the maximum bending stresses and on decrease in permissible loads.
A technique has been developed for simulating the profile and calculating the normal contour stresses during rail bending, considering the wear magnitude. It is applied to the movement of a rail wheelset along the rail track in a straight section of the track. The technique also allows considering horizontal lateral force from the wheel flange during movement of various types of rolling stock in curved track sections. Calculations have been carried out and a nonlinear dependence of the growth of maximum compressive and tensile normal stresses on the degree of wear has been obtained. Three characteristic ranges have been identified and recommendations have been given for reducing the destructive load with regard to rail wear.
Keywords
railway,
wear,
simulation,
stress,
load,
axis of inertia,
chart,
calculation,
rail,
rail side face,
rail foot,
rail head,
unsymmetrical bending
About the Authors
A. N. Bondarenko
Russian University of Transport
Russian Federation
Russian Federation
Ph.D. (Eng), Head of the IBM technology section of MIIT-Expert Training and Research Center of the Institute of Management, Control and Digital Technology
Moscow
S. E. Orlov
Russian University of Transport
Russian Federation
Russian Federation
leading engineer of Leading Center of Welding Technology in Transport Sector of the Institute of Management, Control and Digital Technology of
Moscow
V. I. Karabanov
LLC ProTermit
Russian Federation
Russian Federation
Deputy Director General for research
Togliatti
References
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Review
For citations:
Bondarenko A.N., Orlov S.E., Karabanov V.I. DETERMINING DEPENDENCE OF THE CHANGE IN NORMAL STRESSES IN RAIL ON ITS WEAR DEGREE. World of Transport and Transportation. 2019;17(5):38-56. https://doi.org/10.30932/1992-3252-2019-17-5-38-56
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