Testing and Modelling of Elastomeric Element for an Embedded Rail System

Modelling of elastomeric elements of railway components, able to represent stiffness and damping characteristics in a wide frequency range, is fundamental for simulating the train–track dynamic interaction, covering issues such as rail deflection as well as transmitted forces and higher frequency ph...

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Autores principales:	Qianqian Li, Roberto Corradi, Egidio Di Gialleonardo, Stefano Bionda, Andrea Collina
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	elastomeric material preload-dependent damping frequency-dependent damping macro-mechanical modelling of damping embedded rail system Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/702eee64a741433aa4e83c538c77964f
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spelling	oai:doaj.org-article:702eee64a741433aa4e83c538c77964f2021-11-25T18:15:17ZTesting and Modelling of Elastomeric Element for an Embedded Rail System10.3390/ma142269681996-1944https://doaj.org/article/702eee64a741433aa4e83c538c77964f2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6968https://doaj.org/toc/1996-1944Modelling of elastomeric elements of railway components, able to represent stiffness and damping characteristics in a wide frequency range, is fundamental for simulating the train–track dynamic interaction, covering issues such as rail deflection as well as transmitted forces and higher frequency phenomena such as short pitch corrugation. In this paper, a modified non-linear Zener model is adopted to represent the dependences of stiffness and damping of the rail fastening, made of elastomeric material, of a reference Embedded Rail System (ERS) on the static preload and frequency of its deformation. In order to obtain a reliable model, a proper laboratory test set-up is built, considering sensitivity and frequency response issues. The equivalent stiffness and damping of the elastomeric element are experimentally characterised with force-controlled mono-harmonic tests at different frequencies and under various static preloads. The parameters of the non-linear Zener model are identified by the experimental equivalent stiffness and damping. The identified model correctly reproduces the frequency- and preload-dependent dynamic properties of the elastomeric material. The model is verified to be able to predict the dynamic behaviour of the elastomeric element through the comparison between the numerically simulated and the experimentally measured reaction force to a given deformation time history. Time domain simulations with the model of the reference ERS demonstrate that the modelled frequency- and preload-dependent stiffness and damping of the elastomeric material make a clear difference in the transient and steady-state response of the system when distant frequency contributions are involved.Qianqian LiRoberto CorradiEgidio Di GialleonardoStefano BiondaAndrea CollinaMDPI AGarticleelastomeric materialpreload-dependent dampingfrequency-dependent dampingmacro-mechanical modelling of dampingembedded rail systemTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6968, p 6968 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	elastomeric material preload-dependent damping frequency-dependent damping macro-mechanical modelling of damping embedded rail system Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	elastomeric material preload-dependent damping frequency-dependent damping macro-mechanical modelling of damping embedded rail system Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Qianqian Li Roberto Corradi Egidio Di Gialleonardo Stefano Bionda Andrea Collina Testing and Modelling of Elastomeric Element for an Embedded Rail System
description	Modelling of elastomeric elements of railway components, able to represent stiffness and damping characteristics in a wide frequency range, is fundamental for simulating the train–track dynamic interaction, covering issues such as rail deflection as well as transmitted forces and higher frequency phenomena such as short pitch corrugation. In this paper, a modified non-linear Zener model is adopted to represent the dependences of stiffness and damping of the rail fastening, made of elastomeric material, of a reference Embedded Rail System (ERS) on the static preload and frequency of its deformation. In order to obtain a reliable model, a proper laboratory test set-up is built, considering sensitivity and frequency response issues. The equivalent stiffness and damping of the elastomeric element are experimentally characterised with force-controlled mono-harmonic tests at different frequencies and under various static preloads. The parameters of the non-linear Zener model are identified by the experimental equivalent stiffness and damping. The identified model correctly reproduces the frequency- and preload-dependent dynamic properties of the elastomeric material. The model is verified to be able to predict the dynamic behaviour of the elastomeric element through the comparison between the numerically simulated and the experimentally measured reaction force to a given deformation time history. Time domain simulations with the model of the reference ERS demonstrate that the modelled frequency- and preload-dependent stiffness and damping of the elastomeric material make a clear difference in the transient and steady-state response of the system when distant frequency contributions are involved.
format	article
author	Qianqian Li Roberto Corradi Egidio Di Gialleonardo Stefano Bionda Andrea Collina
author_facet	Qianqian Li Roberto Corradi Egidio Di Gialleonardo Stefano Bionda Andrea Collina
author_sort	Qianqian Li
title	Testing and Modelling of Elastomeric Element for an Embedded Rail System
title_short	Testing and Modelling of Elastomeric Element for an Embedded Rail System
title_full	Testing and Modelling of Elastomeric Element for an Embedded Rail System
title_fullStr	Testing and Modelling of Elastomeric Element for an Embedded Rail System
title_full_unstemmed	Testing and Modelling of Elastomeric Element for an Embedded Rail System
title_sort	testing and modelling of elastomeric element for an embedded rail system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/702eee64a741433aa4e83c538c77964f
work_keys_str_mv	AT qianqianli testingandmodellingofelastomericelementforanembeddedrailsystem AT robertocorradi testingandmodellingofelastomericelementforanembeddedrailsystem AT egidiodigialleonardo testingandmodellingofelastomericelementforanembeddedrailsystem AT stefanobionda testingandmodellingofelastomericelementforanembeddedrailsystem AT andreacollina testingandmodellingofelastomericelementforanembeddedrailsystem
_version_	1718411443206881280

Testing and Modelling of Elastomeric Element for an Embedded Rail System

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