Comparison of dynamic effects of high-speed traffic load on ballasted track using a simplified two-dimensional and full three-dimensional model.

Nguyen Gia, Khanh; Goicolea Ruigómez, José María y Gabaldón Castillo, Felipe (2012). Comparison of dynamic effects of high-speed traffic load on ballasted track using a simplified two-dimensional and full three-dimensional model.. "Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit" ; pp. 1-15. ISSN 0954-4097.

Descripción

Título: Comparison of dynamic effects of high-speed traffic load on ballasted track using a simplified two-dimensional and full three-dimensional model.
Autor/es:
  • Nguyen Gia, Khanh
  • Goicolea Ruigómez, José María
  • Gabaldón Castillo, Felipe
Tipo de Documento: Artículo
Título de Revista/Publicación: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
Fecha: 17 Noviembre 2012
Volumen: 0
Materias:
Palabras Clave Informales: Dynamic response, infinite element, track irregularities, vehicle–track interaction, wheel–rail contact.
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Mecánica de Medios Continuos y Teoría de Estructuras
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The vertical dynamic actions transmitted by railway vehicles to the ballasted track infrastructure is evaluated taking into account models with different degree of detail. In particular, we have studied this matter from a two-dimensional (2D) finite element model to a fully coupled three-dimensional (3D) multi-body finite element model. The vehicle and track are coupled via a non-linear Hertz contact mechanism. The method of Lagrange multipliers is used for the contact constraint enforcement between wheel and rail. Distributed elevation irregularities are generated based on power spectral density (PSD) distributions which are taken into account for the interaction. The numerical simulations are performed in the time domain, using a direct integration method for solving the transient problem due to the contact nonlinearities. The results obtained include contact forces, forces transmitted to the infrastructure (sleeper) by railpads and envelopes of relevant results for several track irregularities and speed ranges. The main contribution of this work is to identify and discuss coincidences and differences between discrete 2D models and continuum 3D models, as wheel as assessing the validity of evaluating the dynamic loading on the track with simplified 2D models

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Depositado el: 10 Ene 2014 18:14
Ultima Modificación: 21 Abr 2016 16:17
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