The effect of Windbreaks on Railway Overheads subject to Cross-Winds at O Eixo Viaduct

Sorribes Palmer, Felix and López García, Oscar and Sanz Andres, Angel Pedro and Cuerva Tejero, Alvaro and Meseguer Ruiz, José and Martínez Muelas, Alejandro and Vega Ramiro, Enrique and Avila Sanchez, Sergio and Mascaraque Sillero, Álvaro and Martínez, J.C. (2012). The effect of Windbreaks on Railway Overheads subject to Cross-Winds at O Eixo Viaduct. In: "Proceedings of The First International Conference on Railway Technology: Research, Development and Maintenance", 18/04/2012-20/04/2012, Las Palmas de Gran Canaria, España.

Description

Title: The effect of Windbreaks on Railway Overheads subject to Cross-Winds at O Eixo Viaduct
Author/s:
  • Sorribes Palmer, Felix
  • López García, Oscar
  • Sanz Andres, Angel Pedro
  • Cuerva Tejero, Alvaro
  • Meseguer Ruiz, José
  • Martínez Muelas, Alejandro
  • Vega Ramiro, Enrique
  • Avila Sanchez, Sergio
  • Mascaraque Sillero, Álvaro
  • Martínez, J.C.
Item Type: Presentation at Congress or Conference (Article)
Event Title: Proceedings of The First International Conference on Railway Technology: Research, Development and Maintenance
Event Dates: 18/04/2012-20/04/2012
Event Location: Las Palmas de Gran Canaria, España
Title of Book: The First International Conference on Railway Technology: Research, Development and Maintenance
Date: 2012
Subjects:
Faculty: Instituto de Microgravedad Ignacio Da Riva (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img] PDF - Users in campus UPM only - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (1MB)

Abstract

A measurement investigation, at ADIF's test site at the O Eixo viaduct which is on the Spanish Santiago-Ourense high speed railway line, has been carried out during the last year. The main goal of the investigation is to study the effect of the cross-wind on railway overheads (catenaries) and the influence of the presence of windbreaks on the wind-induced motion of the railway overhead. A description of the O Eixo viaduct test site is presented in this paper, including the installed windbreaks, the sensor and power supply systems. Three catenary spans has been instrumented at the center point of the catenary span contact wire with one ultrasonic anemometer and two unidirectional accelerometers. Additionally, another ultrasonic anemometer placed in the central catenary span has been installed to provide reference wind data. Wind roses of wind speed and standard deviation of the accelerometers are presented. As expected, the four wind roses look very similar and the two dominant directions close to the perpendicular to the bridge longitudinal axes, north and south have been identified. The wind roses of the standard deviation of the acceleration shows that the acceleration of the catenary contact wire is related to the directions of the two dominant winds. The vertical standard deviation of the acceleration is higher than the horizontal one for the spans with windbreaks. It has also been observed that the presence of the windbreaks modifies the wind flow leading to a wind-induced motion of the catenary contact wire which shows a higher variability than the corresponding unprotected case. On the one hand, the baseline southerly wind configuration (south wind, windbreaks in the windward side and catenary in the leeward side) influence both the mean speed at the catenary and the turbulence intensity. On the other hand, the northerly wind configuration, windbreaks in the leeward side and catenary in the windward side, provide a reference to the response of the catenary for an unprotected railway overhead, and, as it is expected, the windbreak influence is much more reduced compared to the southerly wind configuration. Both the height of the windbreak and the eaves contribute to the increase in the turbulence intensity at the catenary contact wire height. It can be seen that the height of the windbreak plays a crucial role in the increase of turbulence intensity, much more intense than the presence of the windbreak eave.

More information

Item ID: 20012
DC Identifier: http://oa.upm.es/20012/
OAI Identifier: oai:oa.upm.es:20012
Official URL: http://www.ctresources.info/ccp/paper.html?id=6800
Deposited by: Memoria Investigacion
Deposited on: 11 Nov 2013 16:12
Last Modified: 22 Sep 2014 11:18
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM