Design and Methodology for Studying Wheelset Load
https://doi.org/10.30932/1992-3252-2019-17-74-81
Abstract
The wheelset is one of the most vulnerable parts of a carriage in terms of failures. As a rule, the failure is revealed at the stage of operation and depends not only on the type of material, of which wheel and rails are made, but also on the technology of their manufacture and operation. The main malfunctions of wheelsets, the nature and causes of their appearance are considered from the point of view of train operations.
The objective of the study is a brief analysis of wheelsets’ failures, measures to fight them, as well as development of approaches to introduction of new design decisions.
As a debatable problem, the authors suggest a thesis that the existing methods for repairing wheels flanges by surfacing are less promising compared to the technical solution proposed by them. The study proposes to increase reliability of wheelsets at the design stage by making minor changes to the wheel design without changing its geometric characteristics and parameters. Taking into account the cause and the places exposed to the greatest defects (wheel flanges and rims), it is proposed that a rim (hoop) made of a material whose hardness is commensurate with hardness of the rail is pressed onto the wheel of the existing structure in places of the most likely occurrence of the defect. The inner surface of the hoop should completely repeat the outer contour of the wheel in contact with the rim, which provides the necessary bond strength. The proposed technical solution will reduce the stressstrain state of the wheel flange, which is the main cause of failure.
To assess the suggestion by calculating total stresses arising on the contact surface of the wheel, it is proposed to use the classical theory of strength.
The same method is proposed to solve other problems referring to calculation of solutions aimed to increase the life of wheelsets.
So, the main idea of the research is to develop goals and objectives and main directions related to
making fundamentally new decisions to increase the life cycle of wheelsets during their operation, as
well as to develop relevant theoretical principles and a scientific and methodological apparatus.
The objective of the study is a brief analysis of wheelsets’ failures, measures to fight them, as well as development of approaches to introduction of new design decisions.
As a debatable problem, the authors suggest a thesis that the existing methods for repairing wheels flanges by surfacing are less promising compared to the technical solution proposed by them. The study proposes to increase reliability of wheelsets at the design stage by making minor changes to the wheel design without changing its geometric characteristics and parameters. Taking into account the cause and the places exposed to the greatest defects (wheel flanges and rims), it is proposed that a rim (hoop) made of a material whose hardness is commensurate with hardness of the rail is pressed onto the wheel of the existing structure in places of the most likely occurrence of the defect. The inner surface of the hoop should completely repeat the outer contour of the wheel in contact with the rim, which provides the necessary bond strength. The proposed technical solution will reduce the stressstrain state of the wheel flange, which is the main cause of failure.
To assess the suggestion by calculating total stresses arising on the contact surface of the wheel, it is proposed to use the classical theory of strength.
The same method is proposed to solve other problems referring to calculation of solutions aimed to increase the life of wheelsets.
So, the main idea of the research is to develop goals and objectives and main directions related to
making fundamentally new decisions to increase the life cycle of wheelsets during their operation, as
well as to develop relevant theoretical principles and a scientific and methodological apparatus.
About the Authors
L. A. Sladkova
Russian University of Transport
Russian Federation
Russian Federation
D.Sc. (Eng), Professor of the Department of Land Transport Vehicles and
Technology
Moscow
A. N. Neklyudov
Russian University of Transport
Russian Federation
Russian Federation
Ph.D (Eng), Associate Professor, Head of the Department of Track &
Construction Machines and Robotic Complexes
Moscow
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For citations:
Sladkova L.A., Neklyudov A.N. Design and Methodology for Studying Wheelset Load. World of Transport and Transportation. 2019;17(6):74-81. https://doi.org/10.30932/1992-3252-2019-17-74-81
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