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Browsing by Author "Real Herráiz, Julia Irene"

Now showing items 1-20 of 45

A procedure for the evaluation of vibrations induced by the passing of a train and its application to real railway traffic

Salvador Zuriaga, Pablo; Real Herráiz, Julia Irene; Zamorano, Clara; Villanueva, Antonio (Elsevier, 2011-01)

In recent years, ground vibrations have become an important issue due to the growing awareness of the society about environmental living conditions. In this way, vibrations caused by trains running near houses or workplaces ...
An artificial neural network model as a preliminary track design tool

Montalbán Domingo, María Laura; Fernández-Villa, J. A.; Masanet Sendra, Claudio; Real Herráiz, Julia Irene (SAGE PUBLICATIONS LTD, 2015)

The formula derived from Zimmermann s theory is commonly used in railway track design. However, this formula depends on variables such as the ballast coefficient, which are difficult to determine. In recent years, numerical ...
Analysis of vibrations generated by the presence of corrugation in a modeled tram track

Real Herráiz, Julia Irene; Morales-Ivorra, Silvia; Zamorano-Martín, Clara; Soler Basauri, Vicente (Hindawi Publishing Corporation, 2015)

In recent years, there has been a significant increase in the development of the railway system. Despite the huge benefits of railways, one of the main drawbacks of this mode of transport is vibrations caused by vehicles ...
Analysis of vibrations in a modeled ballasted track using measured rail defects.

Real Herráiz, Julia Irene; Asensio Serrano, Tamara; Montalbán Domingo, María Laura; Zamorano, Clara (Research Center of the Public Institution "Vibromechanika", 2012-06)

Vibrations caused by trains and transmitted to the ground and structures nearby are a known source of problems related to railways. Therefore this phenomenon should be studied in detail to avoid a negative impact in the ...
Comparison of the effect of different sleeper typologies and track layout on railway vibrations

Real Herráiz, Julia Irene; Zamorano, C.; Asensio Serrano, Tamara; Montalbán Domingo, María Laura (Argentinean Association of Computational Mechanics, Brazilian Association of Computational Mechanics, Mexican Association of Numerical Methods in Engineering and Applied Sciences, 2014)

[EN] The last years, ground vibrations have become an important study field due to the increase of the transports needs for society and its amount of running trains associated. The vibrations caused by trains are an important ...
Computational considerations of 3-D finite element method models of railway vibration prediction in ballasted tracks

Real Herráiz, Julia Irene; Zamorano, Clara; Hernández, C.; Comendador, R.; Real, T. (Research Center of the Public Institution "Vibromechanika", 2014-06)

The study of vibrations induced by a passing train is of utmost importance to understand better this phenomenon and to design efficient mitigation measures. Within all the techniques used to model vibrations, finite ...
CONTRIBUTION TO THE MODELIZATION, ANALYTICAL AND NUMERICAL, OF GENERATION AND PROPAGATION OF VIBRATIONS ORIGINATED BY RAILWAY TRAFFIC. ANALYSIS OF MITIGATION PROPOSALS

Real Herráiz, Julia Irene (2015-06-25)
Derailment risk and dynamics of railway vehicles in curved tracks: Analysis of the effect of failed fasteners

Morales-Ivorra, Silvia; Real Herráiz, Julia Irene; Hernández Gracia, César; Montalbán-Domingo, Laura (Springer-Verlag, 2016)

[EN] The effect of the fastener s failure in a railway track on the dynamic forces produced in the wheel-rail contact is studied using the simulation software VAMPIRE to assess the derailment risk of two different vehicles ...
Design and validation of a railway inspection system to detect lateral track geometry defects based on axle-box accelerations registered from in-service trains

Real, T.; Montrós Monje, Jorge; Montalbán Domingo, María Laura; Zamorano, Clara; Real Herráiz, Julia Irene (Research Center of the Public Institution "Vibromechanika", 2014-02)

Metropolitan railway transport has become an efficient solution to the mobility necessities in urban areas. Railway track maintenance tasks have to be improved and adjusted to metropolitan requirements, in particular the ...
Design of a new high lateral resistance sleeper and performance comparison with conventional sleepers in a curved railway track by means of finite element models

Montalbán Domingo, María Laura; Real Herráiz, Julia Irene; Zamorano, Clara; Real Herraiz, Teresa Pilar (Argentinean Association of Computational Mechanics, Brazilian Association of Computational Mechanics, Mexican Association of Numerical Methods in Engineering and Applied Sciences, 2014)

The lack of lateral resistance in a curved railway track can produce misalignment problems due to the centrifugal forces when the trains pass through. Moreover, most of the times continuous welded rails (CWR) are used in ...
Determination of rail vertical profile through inertial methods

Real Herráiz, Julia Irene; Salvador Zuriaga, Pablo; Montalbán Domingo, María Laura; Bueno, M. (Professional Engineering Publishing, 2011)

Undergrounds and other metropolitan railway systems are characterized by their intense traffic, lasting up to 20 h per day, and so they need their maintenance work programmes to be optimized, implying an optimization of ...
Development of a system to obtain vertical track geometry measuring axle-box accelerations from in-service trains

Real Herráiz, Julia Irene; Montalbán Domingo, María Laura; Real, T.; Puig, V. (Research Center of the Public Institution "Vibromechanika", 2012)

Nowadays, metropolitan railway systems are in great demand, so they offer high-frequency services for the most part of the day. Therefore there are only a few hours during night available to carry out maintenance tasks. ...
Development of a vehicle track interaction model to predict the vibratory benefits of rail grinding in the time domain

Real Herráiz, Julia Irene; Zamorano, Clara; Velarte, José Luis; Blanco, Antonio Enrique (SpringerOpen, 2015-09)

Imperfections in the wheel-rail contact are one of the main sources of generation of railway vibrations. Consequently, it is essential to take expensive corrective maintenance measures, the results of which may be unknown. ...
Diseño de un nuevo sistema automático de detección temprana de defectos en ruedas ferroviarias basado en técnicas de análisis vibratorio. Aplicación a un tramo de vía en la estación de Sant Andreu de la Barca (Barcelona)

Real Herraiz, Teresa Pilar (2017-11-02)

[ES] Como bien es sabido, en los últimos años se han desarrollado numerosos estudios encaminados a ofrecer un transporte ferroviario más seguro y con altas tasas de confort para los usuarios. Sin embargo, las mayores ...
Diseño de una herramienta para la determinación de pautas de arrastre óptimas en el transporte ferroviario. Aplicación a la red ferroviaria de la Empresa de Ferrocarriles del Estado de Chile.

Montalbán Domingo, María Laura (2015-09-08)

[EN] The increasing globalization of markets has led to a greater volume of both imports and exports in almost all countries over the world. Regarding the modal split of freight transport, it is easy to see the great ...
Diseño de una nueva cuña de transición, a partir de elementos prefabricados, para su uso en vías ferroviarias. Aplicación en la línea Antequera - Granada

Morales Ivorra, Silvia (2016-10-20)

[EN] Nowadays, railway transport has experienced increases of traffic, axle loads and trains speed. Moreover, track quality, comfort and security requirements are today stricter than ever, especially in high-speed networks. ...
Diseño e implementación de un sistema de detección temprana y alarma de la aproximación de trenes para labores de mantenimiento

Andrés López, Laura (2018-10-11)

[ES] Este trabajo fin de máster se realiza en colaboración con el Instituto Universitario de Matemática Multidisciplinar de la Universidad Politécnica de Valencia, en concreto el grupo de investigación liderado por Julia ...
Diseño y desarrollo de un sistema de atenuación de vibraciones mecánicas en el entorno ferroviario. Aplicación en las vías del acceso este a la estación de metro de Torrente (Valencia)

Zornoza Arnao, Adrián (2019-07-09)

[EN] The present TFM is about obtaining a new vibration-attenuating solution originated by rail transport. This solution consists in the installation of a barrier formed by precast concrete frames applied forming an anti-wave ...
Estudio de la inclusión de bloques de hormigón con residuos de neumáticos como elementos anti-onda en vías ferroviarias. Evaluación técnico económica. Aplicación a la red de Ferrocarrils de la Generalitat de Cataluña.

Gallen Broch, Daniel (2016-09-29)

[EN] In the last few years, the railway has become the most successful conveyance in the market shares. The railway has a huge load capacity and it has also a high utility that makes reduce the pollution in the environment. ...
Estudio de la influencia de la junta ferroviaria en la generación de vibraciones y sobrecargas dinámicas. Aplicación al tramo de vía Xàtiva-Alcoi.

Llorca Pellicer, Luis (2015-11-17)

[ES] El fin de esta investigación es la obtención de las fuerzas de contacto-impacto generadas en el paso de una rueda por una junta. En este trabajo se considera más importante las fuerzas de impacto o sobrecargas generadas ...