Design and Development of a Twin Disc Test Rig for the Study of Squeal Noise from the Wheel – Rail Interface

Omasta, Milan; Navrátil, Václav; Gabriel, Tomàs; Galas, Radovan; Klapka, Milan

doi:10.18485/aeletters.2022.7.1.2

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…This phenomenon, caused by a high alternating stress field in the contact area, leads to material removal driven by crack propagation. This phenomenon also accounts for wheel squeal noise [2]. This unpleasant noise, occurring mainly due to lateral creepage, is troublesome in densely populated areas.…”

Section: Introductionmentioning

confidence: 99%

Power Dissipation and Wear Modeling in Wheel–Rail Contact

Myśliński,

Chudzikiewicz

2023

Applied Sciences

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This paper is concerned with the modeling of power dissipation due to friction and its relation with wear estimation in wheel–rail contact. Wear is a complex multi-scale and multi-physical phenomenon appearing in rolling contact. Wear is generated by high contact stress and the work of friction forces. This phenomenon leads to the appearing of the worn material in the form of wear debris between contacting surfaces. In contact models, wear is usually described in terms of the wear depth function. This function modifies the gap between the contacting bodies as well as the shape of the surfaces of the wheel and rail in contact. In this paper, besides the wear depth function, the dissipated energy, rather than the contact stress, is taken into account to evaluate the wear impact on rail or wheel surfaces. The dissipated energy allows us to more precisely evaluate the wear debris amount as well as the depth of wear and its distribution along the contact interface. A two-dimensional rolling contact problem with frictional heat flow is considered. The elasto-plastic deformation of the rail is considered. This contact problem is governed by a coupled system of mechanical and thermal equations in terms of generalized stresses, displacement and temperature. The finite element method is used to discretize this problem. A discretized system of equations with nonpenetration and friction conditions is transformed and formulated as a nonlinear complementarity problem. The generalized Newton method is applied to numerically solve this mechanical subproblem. The Cholesky method is used to find the solution of the heat-conductive problem. The dissipated power is evaluated based on the resultant force and slip at a reference point. Numerical results including the distribution of slip velocity, power factor and wear rate are provided and discussed.

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Section: Introductionmentioning

confidence: 99%