Multivariate modeling of design parameters of elastic terminals in the form of a torsion spring, with the analysis of their stress-strain state
https://doi.org/10.52170/1815-9265_2024_72_80
Abstract
The main modern intermediate rail fasteners on the railways of Russian Railways are fasteners with elastic bar terminals. The design of these fasteners continues to be constantly developed by developers, including the emphasis on the design of the elastic bar terminals themselves. One of the main disadvantages of B-shaped elastic terminals is the inefficient distribution of the mounting force – about half of the force applied to the bolt (fastener) is directed at pressing the sole of the rail.
A terminal in the form of a torsion spring (or a coil terminal) is considered as a promising design of an elastic bar terminal for intermediate rail fasteners, the main advantage of which is a more successful clamping force distribution scheme.
The article presents the results of multivariate modeling of the geometric parameters of the winding terminals (42 pieces) with an analysis of their stress-strain state. The calculations were carried out using the SolidWorks and Ansys Workbanch software and computing systems.
As a result of calculations of multivariate models the stress-strain state of the coil terminal was analyzed and the degrees of influence of the intervals of variation of the geometric parameters of the terminal were determined: terminal coil pitch (17–30 mm); terminal rod diameter (12–20 mm); number of terminal coils (1.4–3.4); terminal coil diameter (50–70 mm).
Based on the geometry of the rail, the relative location of the proposed elements of the fastening unit, ensuring an optimal stress-strain state and the lowest possible material consumption of the terminal, the most optimal design parameters of elastic terminals in the form of a torsion spring are: the diameter of the coil is 50 mm, the number of coils of the semi-terminal is 2.4, the diameter of the rod is 16 mm, the pitch of the coil is 17 mm.
About the Authors
M. A. Karyukin
Siberian Transport University
Russian Federation
Russian Federation
Maxim A. Karyukin – Associate Professor of the Track and Track Facilities Department
Novosibirsk
D. V. Velichko
Siberian Transport University
Russian Federation
Russian Federation
Dmitriy V. Velichko– Associate Professor of the Track and Track Facilities Department, Candidate of Engineering, Associate Professor
Novosibirsk
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Review
For citations:
Karyukin M.A., Velichko D.V. Multivariate modeling of design parameters of elastic terminals in the form of a torsion spring, with the analysis of their stress-strain state. Bulletin of Siberian State University of Transport. 2024;(5):80-89. (In Russ.) https://doi.org/10.52170/1815-9265_2024_72_80
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