Memorias de investigación
Research Publications in journals:
Comparison of dynamic eeffects of high speed traffic load on ballasted track using a simplified 2D and full 3D model
Year:2012
Research Areas
  • Rail transport,
  • Vibrations
Information
Abstract
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
International
Si
JCR
Si
Title
Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
ISBN
0954-4097
Impact factor JCR
0,436
Impact info
Volume
10.1177/0954409712465710
Journal number
From page
1
To page
12
Month
NOVIEMBRE
Ranking
86 out of 118 in Civil Engineering, 90 out of 122 in Mechanical Engineering and 23 out of 28 in Science & Technology Transportation
Participants
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Mecánica Computacional
  • Departamento: Mecánica de Medios Continuos y Teoría de Estructuras