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Wind and Structures Volume 21, Number 1, July 2015 , pages 105-117 DOI: https://doi.org/10.12989/was.2015.21.1.105 |
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Numerical characterization of real railway overhead cables |
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Cristina Sanchez-Rebollo, Enrique Velez and Jesus R. Jimenez-Octavio
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| Abstract | ||
| This paper presents a numerical characterization of real railway overhead cables based on computational fluid dynamics (CFD). Complete analysis of the aerodynamic coefficients of this type of cross section yields a more accurate modelling of pressure loads acting on moving cables than provided by current approaches used in design. Thus, the characterization of certain selected commercial cables is carried out in this work for different wind speeds and angles of attack. The aerodynamic lift and drag coefficients are herein determined for two different types of grooved cables, which establish a relevant data set for the railway industry. Finally, the influence of this characterization on the fluid-structure interaction (FSI) is proved, the static behavior of a catenary system is studied by means of the finite element method (FEM) in order to analyze the effect of different wind angles of attack on the stiffness distribution. | ||
| Key Words | ||
| aerodynamic characteristics; overhead catenary line; CFD simulation; cable; lift force | ||
| Address | ||
| Cristina Sanchez-Rebollo: Institute for Research in Technology, Universidad Pontificia Comillas, c/ Santa Cruz de Marcenado 26, 28015 Madrid, Spain Enrique Velez and Jesus R. Jimenez-Octavio: Department of Mechanical Engineering, Universidad Pontificia Comillas, c/ Alberto Aguilera 23, 28015 Madrid, Spain | ||