Dynamic analysis using finite elements to calculate the critical wear section of the contact wire in suburban railway overhead conductor rails

González, Francisco Javier and Chover Álvarez-Monteserín, José Antonio and Suárez Esteban, Berta and Vázquez, Manuel (2008). Dynamic analysis using finite elements to calculate the critical wear section of the contact wire in suburban railway overhead conductor rails. "Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit", v. 222 (n. 2); pp. 145-157. ISSN 0954-4097. https://doi.org/10.1243/09544097JRRT144.

Description

Title: Dynamic analysis using finite elements to calculate the critical wear section of the contact wire in suburban railway overhead conductor rails
Author/s:
  • González, Francisco Javier
  • Chover Álvarez-Monteserín, José Antonio
  • Suárez Esteban, Berta
  • Vázquez, Manuel
Item Type: Article
Título de Revista/Publicación: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
Date: 1 March 2008
ISSN: 0954-4097
Volume: 222
Subjects:
Freetext Keywords: catenary, contact wire wear, pantograph-catenary interaction, tension, maintenance, dynamic analysis, simulation, finite elements
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Mecánica y de Fabricación [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The purpose of this study is to determine the critical wear levels of the contact wire of the catenary on metropolitan lines. The study has focussed on the zones of contact wire where localised wear is produced, normally associated with the appearance of electric arcs. To this end, a finite element model has been developed to study the dynamics of pantograph-catenary interaction. The model includes a zone of localised wear and a singularity in the contact wire in order to simulate the worst case scenario from the point of view of stresses. In order to consider the different stages in the wire wear process, different depths and widths of the localised wear zone were defined. The results of the dynamic simulations performed for each stage of wear let the area of the minimum resistant section of the contact wire be determined for which stresses are greater than the allowable stress. The maximum tensile stress reached in the contact wire shows a clear sensitivity to the size of the local wear zone, defined by its width and depth. In this way, if the wear measurements taken with an overhead line recording vehicle are analysed, it will be possible to calculate the potential breakage risk of the wire. A strong dependence of the tensile forces of the contact wire has also been observed. These results will allow priorities to be set for replacing the most critical sections of wire, thereby making maintenance much more efficient. The results obtained show that the wire replacement criteria currently borne in mind have turned out to be appropriate, although in some wear scenarios these criteria could be adjusted even more, and so prolong the life cycle of the contact wire.

More information

Item ID: 12672
DC Identifier: http://oa.upm.es/12672/
OAI Identifier: oai:oa.upm.es:12672
DOI: 10.1243/09544097JRRT144
Official URL: http://pif.sagepub.com/content/222/2/145
Deposited by: Berta Suárez Esteban
Deposited on: 02 Sep 2012 08:06
Last Modified: 21 Apr 2016 11:57
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