RT info:eu-repo/semantics/conferenceObject
T1 Towards the numerical ground-borne vibrations predictive models as a design tool for railway lines: A starting point
A1 García Moreno, Andrés
A1 Ruiz Aguilar, Juan Jesús
A1 Moscoso López, José Antonio
K1 Ferrocarriles
K1 Railways
K1 Ingeniería civil
K1 Civil engineering
K1 Transportes
K1 Transportation
AB In recent decades, High-Speed Railway (HSR) lines have become one of the most extendedand environmental-friendly ways to plan new mass transport networks. These systems aredirectly influenced by its operational speed generated dynamic effects and the areas whereit runs through. This necessarily requires to predict ground-borne vibrations generated bytrains passing-by populated areas and its influence zone.Trends in ground-borne measurements, prediction models, and isolation systems are usuallyperformed for maximum operation speed. This method implies the maximum dynamicforces which are suitable for structural calculations (generally developed in time domain)but not necessary for vibration related issues (emission and/or transmission). Additionally,these studies are mainly focused on urban areas where maximum operational speed arefrequently far from railways service’s top speeds.Related to frequency domain, it is known that upper frequencies are not the most disturbingones. In fact, European structural standards usually cut frequencies off at 30 Hz, so muchrelevant information for vibrational prediction is ignored due to it does not influencestructural issues.Moreover, current common predictive numerical models usually apply punctual loads (birth& death) that are disposed to run in certain speed conditions. This method, which isconsidered valid for time domain analysis, are identified to be incomplete for frequencydomain components due to its discontinuous application of loads.The implementation of contact theories in the wheel-rail interface implies a continuous loadapplication, refining the obtained results but increasing computational cost.In this study, different scenarios are compared varying inner and boundary conditions of amodel, with the aim of validate results and optimize resources by obtaining a parametricalinfluence study that will show how different assumptions and cases could condition groundbornevibrational studies results.
PB Universidad de Burgos. Servicio de Publicaciones e Imagen Institucional
SN 978-84-18465-12-3
YR 2021
FD 2021-07
LK http://hdl.handle.net/10259/6875
UL http://hdl.handle.net/10259/6875
LA eng
NO Trabajo presentado en: R-Evolucionando el transporte, XIV Congreso de Ingeniería del Transporte (CIT 2021), realizado en modalidad online los días 6, 7 y 8 de julio de 2021, organizado por la Universidad de Burgos
DS Repositorio Institucional de la Universidad de Burgos
RD 22-dic-2024