Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail Vibrations
The rail pad is the elastic element between the rail and the sleeper that has the role of absorbing the mechanical stresses from the rail and reducing the vibrations and shocks generated by wheel–rail interactions. In this paper, the problem of the influence of the variability of the nonlinear load-...
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MDPI AG
2023-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/4/1531 |
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| author | Traian Mazilu Mădălina Dumitriu Ionuț-Radu Răcănel |
| author_facet | Traian Mazilu Mădălina Dumitriu Ionuț-Radu Răcănel |
| author_sort | Traian Mazilu |
| collection | DOAJ |
| description | The rail pad is the elastic element between the rail and the sleeper that has the role of absorbing the mechanical stresses from the rail and reducing the vibrations and shocks generated by wheel–rail interactions. In this paper, the problem of the influence of the variability of the nonlinear load-deformation characteristic of rail pads (resulting from the manufacturing process) on wheel–rail vibrations is investigated. The limit load-deformation characteristics of a manufactured rail pad and the medium load-deformation characteristic resulting as the arithmetic mean of the two are considered. The nonlinear load-deformation characteristic of the ballast is also considered. All these characteristics are approximated with the help of the bilinear function and are implemented in a track model consisting of an infinite Euler-Bernoulli beam placed on a two-elastic layer continuous foundation with inertial insertion, resulting in a model with an inhomogeneous foundation. The parameters of the inhomogeneous foundation are established from the equilibrium condition under a static load. Wheel–rail vibrations are studied in terms of the contact force and the acceleration of the rail and wheel. The influence of the variability of the elastic characteristics of the rail pad manifests itself in the field of medium frequencies, which amplify or attenuate the vibration levels in certain bands of one-third of an octave. |
| first_indexed | 2024-03-11T08:29:47Z |
| format | Article |
| id | doaj.art-c9c16f85a5a945dda469ef16c89ae37e |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T08:29:47Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-c9c16f85a5a945dda469ef16c89ae37e2023-11-16T21:51:03ZengMDPI AGMaterials1996-19442023-02-01164153110.3390/ma16041531Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail VibrationsTraian Mazilu0Mădălina Dumitriu1Ionuț-Radu Răcănel2Department of Railway Vehicles, University Politehnica of Bucharest, 060042 Bucharest, RomaniaDepartment of Railway Vehicles, University Politehnica of Bucharest, 060042 Bucharest, RomaniaDepartment of Strength of Materials, Bridges and Tunnels, Technical University of Civil Engineering Bucharest, 020396 Bucharest, RomaniaThe rail pad is the elastic element between the rail and the sleeper that has the role of absorbing the mechanical stresses from the rail and reducing the vibrations and shocks generated by wheel–rail interactions. In this paper, the problem of the influence of the variability of the nonlinear load-deformation characteristic of rail pads (resulting from the manufacturing process) on wheel–rail vibrations is investigated. The limit load-deformation characteristics of a manufactured rail pad and the medium load-deformation characteristic resulting as the arithmetic mean of the two are considered. The nonlinear load-deformation characteristic of the ballast is also considered. All these characteristics are approximated with the help of the bilinear function and are implemented in a track model consisting of an infinite Euler-Bernoulli beam placed on a two-elastic layer continuous foundation with inertial insertion, resulting in a model with an inhomogeneous foundation. The parameters of the inhomogeneous foundation are established from the equilibrium condition under a static load. Wheel–rail vibrations are studied in terms of the contact force and the acceleration of the rail and wheel. The influence of the variability of the elastic characteristics of the rail pad manifests itself in the field of medium frequencies, which amplify or attenuate the vibration levels in certain bands of one-third of an octave.https://www.mdpi.com/1996-1944/16/4/1531wheel–rail vibrationrail padbilinear functionEuler-Bernoulli beaminhomogeneous foundation |
| spellingShingle | Traian Mazilu Mădălina Dumitriu Ionuț-Radu Răcănel Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail Vibrations Materials wheel–rail vibration rail pad bilinear function Euler-Bernoulli beam inhomogeneous foundation |
| title | Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail Vibrations |
| title_full | Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail Vibrations |
| title_fullStr | Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail Vibrations |
| title_full_unstemmed | Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail Vibrations |
| title_short | Parametric Study of the Influence of Nonlinear Elastic Characteristics of Rail Pads on Wheel–Rail Vibrations |
| title_sort | parametric study of the influence of nonlinear elastic characteristics of rail pads on wheel rail vibrations |
| topic | wheel–rail vibration rail pad bilinear function Euler-Bernoulli beam inhomogeneous foundation |
| url | https://www.mdpi.com/1996-1944/16/4/1531 |
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