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Dissertations / Theses on the topic 'Model of railway track'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Leong, Jeffrey. "Development of a limit state design methodology for railway track." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16565/.

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The research presented in this thesis is aimed at developing a limit state design methodology for railway track for recommendation to Standards Australia's next revision of the 'Permanent way materials: prestressed concrete sleepers' code (AS1085.14, 2003). There is widespread suspicion that the railway track, particularly concrete sleepers, have untapped reserves of strength that has potential engineering and economic advantages for track owners. Through quantifying the effects of train speed, wheel impact loadings and distribution of vehicle loads, track engineers would be able to design

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2

OLIVEIRA, ADENILSON COSTA DE. "A DYNAMIC INTERACTION MODEL OF TRACK RAILWAY STRUCTURAL ELEMENTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9498@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Em uma ferrovia, o veículo interage dinamicamente com a superestrutura (trilhos, palmilha e dormentes) e a subestrutura (lastro, sublastro e sub- base). O conforto dos passageiros, a vibração no solo e a freqüência dos trabalhos, de manutenção tanto dos veículos como também dos trilhos são determinadas considerando-se que todos os elementos estruturais interagem entre si. A resposta de cada componente estrutural é sensível µa pressão do eixo da roda no trilho, µas irregularidades na superfície do trilho e µa velo- cidade do

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3

Lindfeldt, Olov. "Quality on single-track railway lines with passenger traffic : Anlytical model for evaluation of crossing stations and partial double-tracks." Licentiate thesis, KTH, School of Architecture and the Built Environment (ABE), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4560.

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<p>Railway transportation is showing a substantial increase. Investments in new infrastructure, new fast and comfortable vehicles, and high frequency of service are important factors behind the increase.</p><p>Infrastructure configuration and timetable construction play important roles in the competitiveness of railway transportation. This is especially true on single-track lines where the travel times and other timetable related parameters are severely restricted by crossings (train meetings). The crossings also make the lines’ operation more sensitive to disturbances.</p><p>Since the major p

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4

Frohling, Robert Desmond. "Deterioration of railway track due to dynamic vehicle loading and spatially varying track stiffness." Thesis, Pretoria : [s.n.], 1997. http://upetd.up.ac.za/thesis/available/etd-01122009-160350.

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5

Steffens, David Martyn. "Identification and Development of a Model of Railway Track Dynamic Behaviour." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16029/.

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The research presented in this thesis has identified and developed a sophisticated computer model for the analysis of railway track dynamic behaviour to be used by the Rail Cooperative Research Centre for Railway Engineering and Technologies (Rail CRC) in Australia. To be competitive railway track owners need to extract as much performance as possible from their asset without serviceability or catastrophic failure. Railway track designers therefore need to develop more knowledge of the static and dynamic loadings that track may be subjected to in its lifetime. This would be best undertaken

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6

Maddela, Naveen. "Finite Element Analysis of Railway Track Wooden Sleeper." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Railway sleepers have important roles within the complex railroad. Dynamic interaction among Rail, sleeper and ballast supports are vital for the construction of dynamic model track capable of predicting its responses to impact loads due to wheel flats, wheel burns, irregularities of the rail. Railway track deteriorates over time due to the dynamic loading of passing wheeled vehicle. to ensure the secure passing of trains, the track must well design and managed.The objective of this thesis is to determine the stress in wooden rail sleeper by the considering Ballast, Sub ballast, and soil with

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7

Feng, Huan. "3D-models of railway track for dynamic analysis." Thesis, KTH, Transportvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-52619.

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In recent decades, railway transport infrastructures have been regaining their importance due to their efficiency and environmentally friendly technologies. This has led to increasing train speeds, higher axle loads and more frequent train usage. These improved service provisions have however brought new challenges to traditional railway track engineering, especially to track geotechnical dynamics. These challenges demanded for a better understanding of the track dynamics. Due to the large cost and available load conditions limitation, experimental investigation is not always the best choice f

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8

Witt, Stephen. "The Influence of Under Sleeper Pads on Railway Track Dynamics." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12232.

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<p>In this work the influence of Under Sleeper Pads on the dynamic forces on a railway track is investigated. A special interest is devoted to the effect of using Under Sleeper Pads in a railway track with changing vertical stiffness. The contact force between wheel and rail and the ballast contact forces are examined. For the investigation a finite element model with the length of thirty sleepers is created and calculations are performed with the software LS-DYNA. Three different cases of varying vertical track stiffness are studied: the transition from an embankment to a bridge, a randomly v

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9

Lindfeldt, Olov. "Quality on single-track railway lines with passenger traffic : analytical model for evaluation of crossing stations and partial double-tracks /." Stockholm : Department of Transport and Economics, KTH, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4560.

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10

Schlechte, Thomas [Verfasser], and Martin [Akademischer Betreuer] Grötschel. "Railway Track Allocation: Models and Algorithms / Thomas Schlechte. Betreuer: Martin Grötschel." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2012. http://d-nb.info/1019853166/34.

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11

Jain, Ashish. "Discrete Element Modeling of Railway Ballast for Studying Railroad Tamping Operation." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/91438.

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The development of Discrete Element Model (DEM) of railway ballast for the purpose of studying the behavior of ballast particles during tamping is addressed in a simulation study, with the goal of optimizing the railroad tamping operation. A comprehensive literature review of applicability of DEM techniques in modeling the behavior of railway ballast is presented and its feasibility in studying the fundamental mechanisms that influence the outcome of railroad tamping process is analyzed. A Discrete Element Model of railway ballast is also developed and implemented using a commercially availabl

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12

Martino, Davide. "Train-Bridge Interaction on Freight Railway Lines." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99386.

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This study investigates the dynamic response of a railway bridge under train passage. Three load models designed around the Swedish Steel Arrow freight train are tested and compared. A series of Concentrated Forces, a succession of single degree of freedom Sprung-Masses, and a sequence of complex multi-degree of freedom Train Wagons. The increase in accuracy of the representation corresponds to taking into account the inertial properties of the wagons. The track-bed layer is substitute by a sequence of regularly spaced couple of springs and dampers at the sleeper distance. Under the assumption

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13

Jidayi, Yakubu Mara. "Reliability improvement of railway infrastructure." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97047.

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Thesis (MEng)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: The railway transportation system is fundamental in sustaining the economic activities of a country, by providing a safe, reliable and relatively affordable means of transporting people and goods; hence, the need to ensure its ongoing reliability is of paramount importance. The principle and applications of rail reliability have been reviewed, and reliability improvement in rail infrastructure has been investigated using failure mode and effect analysis (FMEA). Reliability improvement is a continuous process that is geared

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14

Wu, Tianxing. "Development and application of theoretical models for high frequency vibration of railway track." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312938.

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15

Savini, Gabriel. "A numerical program for Railway vehicle-track-structure dynamic interaction using a modal substructuring approach." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/2098/.

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This work presents a program for simulations of vehicle-track and vehicle-trackstructure dynamic interaction . The method used is computationally efficient in the sense that a reduced number of coordinates is sufficient and doesn’t require high efficiency computers. The method proposes a modal substructuring approach of the system by modelling rails , sleepers and underlying structure with modal coordinates, the vehicle with physical lumped elements coordinates and by introducing interconnection elements between these structures (wheel-rail contact, railpads and ballast) by means of th

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De, Abreu Corrêa Lúcio. "Large scale numerical wave propagation in a randomly-fluctuating continuum model of ballasted railway tracks." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC018/document.

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Une forte concurrence avec d'autres moyens de transport a poussé l’industrie ferroviaire à se réinventer et rechercher des performances toujours plus élevées. De nos jours, l’obtention de vitesses chaque fois plus élevées exige le développement de modèles numériques précis pour concevoir et prédire le comportement des voies ferrées sous les contraintes mécaniques imposées par le passage du convoi. Dans cette thèse, nous avons concentré l'étude sur la couche de ballast. Ce composant présente un comportement mécanique complexe, lié à la nature granulaire de ses composants, il peut être solide, l

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17

Saad, Jorge Antonio Cury. "Modelo para análise da operação de trechos ferroviários em linha singela." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-26012018-183007/.

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O objetivo da pesquisa aqui relatada é desenvolver um modelo de simulação estocástica capaz de reproduzir a circulação de trens em trechos de linha singela. O modelo é usado para avaliar o impacto que determinadas alterações podem provocar sobre o desempenho do sistema. Os fatores estudados são o número de estações existentes, os horários de partida dos trens, os tempos de parada nas estações e a velocidade média dos trens, que foram combinados em sete cenários diferentes. Os efeitos das alterações propostas são avaliados em termos do tempo total de percurso dos trens, o tempo médio de espera

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18

Elm, Dahlman Rasmus, and Emil Lundberg. "Parametric Studies of Train-Track-Bridge Interaction : An evaluation of the dynamic amplification due to track irregularities for freight transport." Thesis, KTH, Bro- och stålbyggnad, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-301309.

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In this thesis a train-track-bridge interaction (TTBI) model is developed in order to study the dynamic amplification from track irregularities on railway bridges traversed by freight trains. These simulations are of great importance since rail freight transport is expected to increase in order to meet the climate goals. The shift of the freight industry is however not accomplished without complications, because of the heavier and more frequent transportation higher demand is put on the infrastructure supporting the railways. In order to adequately assess the bearing capacity of the railway br

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19

Rashid, Shahbaz. "Parametric study of bridge response to high speed trains, ballasted track on concrete bridges." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99385.

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When a train enters a bridge, passenger sitting inside will feel a sudden bump in the track, which not only affect the riding comfort of the passengers but also put a dynamic impact on the bridge structure. Due to this impact force, we have very serious maintenance problems in the track close to the bridge structure. This sudden bump is produced when train travelling on the track suddenly hit by a very stiff medium like bridge structure. In order to reduce this effect, transition zones are introduced before the bridge so that the change in stiffness will occur gradually without producing any b

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20

Lindfeldt, Olov. "Railway operation analysis : Evaluation of quality, infrastructure and timetable on single and double-track lines with analytical models and simulation." Doctoral thesis, KTH, Trafik och Logistik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12727.

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This thesis shows the advantages of simple models for analysis of railway operation. It presents two tools for infrastructure and timetable planning. It shows how the infrastructure can be analysed through fictive line designs, how the timetable can be treated as a variable and how delays can be used as performance measures. The thesis also gives examples of analyses of complex traffic situations through simulation experiments. Infrastructure configuration, timetable design and delays play important roles in the competitiveness of railway transportation. This is especially true on single-track

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21

Gillet, Guillaume. "Simply supported composite railway bridge: a comparison of ballasted and ballastless track alternatives : Case of the Banafjäl Bridge." Thesis, KTH, Bro- och stålbyggnad, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36359.

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22

Peřinová, Kateřina. "Bezstyková kolej v obloucích malých poloměrů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372205.

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The diploma thesis deals with the curve radius influence on lateral stability of continuous welded rail. It is presented the overview of present state of knowledge in the field of stability of continuous welded rail. In practical part is created the model of a track section. The influence of some parameters on loss of stability of CWR was studied. The results it are compare with the analytic analysis.

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23

Naude, Francois Paulus. "Development of a methodology for calculating stresses in track components." Diss., Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-07282005-090746.

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24

Blanco, Blas. "Railway track dynamic modelling." Licentiate thesis, KTH, Farkost och flyg, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-207180.

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The railway vehicles are an increasing mean of transportation due to, its reduced impact on environment and high level of comfort provided. These reasons have contributed to settle a positive perception of railway traffic into the European society. In this upward context, the railway industrial sector tackles some important challenges; maintaining low operational costs and controlling the nuisance by-products of trains operation, the most important being railway noise. Track dynamic plays a main role for both issues, since a significant part of the operational costs are associated with the tra

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Tichý, Jiří. "Multi-body modely dynamických soustav s elektro-mechanickými rezonátory." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443721.

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This thesis is dealing with creation of computation model of energy harvestors. Harvestors based on translational motion and planar motion were modeled. These models were created in MSC Adams. Proposed harvestors are tranforming mechanical vibrations into electrical energy by electromagnetical induction. To achieve better electrical output, harvestors were tuned to natural frequency suitable for chosen aplication. First proposed harvestor is meant for railway track. For validation of its usability in intended application, model of railway track section is also proposed. Force generated by pass

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26

Muinde, Michael. "Railway track geometry inspection optimization." Thesis, Luleå tekniska universitet, Drift, underhåll och akustik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71280.

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Railway transportation plays a vital role in modern societies. Due to increasing demands for transportation of passengers and goods, higher speed trains with heavier axle loads are introduced to the railway system, and it is expected to continue in the future. Therefore, track geometry bears huge static and dynamic forces that accelerate degradation process. As a result, railway track should be inspected regularly to detect geometry faults and to plan for maintenance actions in advance. Track geometry inspection has a profound impact on railway track availability and maintenance cost. Although

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27

Wu, Wendy Xiaohui. "The corrugation of railway track." Thesis, London South Bank University, 1997. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245157.

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28

Khadem, Sameni M. "Railway track capacity : measuring and managing." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/348816/.

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This thesis adopts a holistic approach towards railway track capacity to develop methodologies for different aspects of defining, measuring, analysing, improving and controlling track capacity utilisation. Chapter 1 presents an overview of the concept of capacity and the railway capacity challenge is explained. Chapter 2 focuses on past approaches to defining and analysing the concept of railway capacity. Existing methods for estimating capacity utilisation are studied in four categories: analytical methods, parametric models, optimisation and simulation. Chapter 3 examines various factors aff

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Collins, M. J. "Improvements in track to train communications for railway jointless track circuits." Thesis, University of Bath, 1997. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362264.

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30

Hildebrand, Robert. "Countermeasures against railway ground and track vibrations." Doctoral thesis, KTH, Vehicle Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3263.

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<p>Railway track and ground vibrations are considered, with anemphasis on methods of mitigation ("countermeasures"), forapplication to wayside disturbance problems.</p><p>Original field measurements from two sites in Sweden, aswell as borrowed measurements from Norway, provide vibrationresults at many points on the track, on and underneath theground surface, for a variety of trains, both with and withoutcountermeasures in-place.</p><p>Infinite periodic system theory is the basis of track-onlyand track-ground interaction models presented. The repeatingelement includes the sleeper, pad-fastener,

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31

Al-Douri, Yamur K. "Information assurance for maintenance of railway track." Licentiate thesis, Luleå tekniska universitet, Drift, underhåll och akustik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26609.

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Railway traffic is steadily increasing, having a negative impact on maintenance and resulting in decreased track availability, comfort, and safety. Swedish railway track maintenance mostly focuses on the actual track condition via a nationwide condition-based maintenance (CBM) strategy. For maintenance to be conducted in an appropriate way, data on the actual track condition must be accurate; furthermore, those data need to be converted into accurate information for maintenance decisions. An information assurance (IA) framework has the potential to deal with the system risks from a technical p

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32

Gry, Laurent. "Modélisation du comportement dynamique d'une voie TGV pour la réduction du bruit de roulement." Châtenay-Malabry, Ecole centrale de Paris, 1995. http://www.theses.fr/1995ECAP0419.

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Un modèle de voie périodique a été développé afin de réduire le bruit émis dans l'environnement durant le passage d'un train. Ce modèle, prenant en compte les déformations de la section du rail, couvre une large gamme de fréquences, 0 - 5000 Hz. La considération d'un appui discret le rend cependant moins performant dans les hautes fréquences, pour lesquelles les ondes propagatives émises sur une travée ont une longueur d'onde proche de la longueur d'appui. Une méthode générale d'analyse des milieux périodiques unidimensionnels est alors proposée afin de prendre en compte l'effet de la longueur

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33

Hunt, Geoffrey A. "Dynamic analysis of railway vehicle/track interaction forces." Thesis, Loughborough University, 1986. https://dspace.lboro.ac.uk/2134/7492.

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Methods of predicting the dynamic forces are developed for the cases of vehicles negotiating vertical and lateral track irregularities. The bounds of validity of various models of the track are evaluated, from single degree of freedom, lumped parameter models to the case of a two layered beam on elastic foundation with a moving dynamic load. For the case of the lateral response of a vehicle negotiating a track switch, a finite element model of the track is also developed. The vehicle model developed for-the vertical case contains all the rigid body modes of a four axle vehicle for which primar

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Kostovasilis, Dimitrios. "Analytical modelling of the vibration of railway track." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/413811/.

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The high frequency dynamic behaviour of railway track, in both vertical and lateral directions, strongly affects the generation of rolling noise as well as other phenomena such as rail corrugation. One aspect that has received little attention is the coupling between the vertical and lateral directions. This thesis sets out to build an analytical model of a railway track with three principal targets: to improve the modelling for lateral vibration compared with existing models, to identify the most important sources of coupling between the vertical and lateral directions and to quantify the imp

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Bezin, Yann. "An Integrated Flexible Track System Modelfor Railway Vehicle Dynamics." Thesis, Manchester Metropolitan University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.502435.

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This thesis describes the development and validation of a versatile and Flexible Track System Model (FTSM) and its integration into a commercial railway vehicle dynamics software tool. The work was initiated to fill a gap in current disciplines and tools used to investigate problems relating to vehicle and railway track dynamics due to a lack of correlation between Finite Element (FE) and MuItibody System (MBS) based models. The. FTSM track model was validated against results from laboratory testing and compared with existing models. It was then used to study several aspects of the deteriorati

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Pagnutti, Jeffrey L. "IN SITU RAILWAY TRACK FAULT DETECTION USING RAILCAR VIBRATION." Thesis, Laurentian University of Sudbury, 2014. https://zone.biblio.laurentian.ca/dspace/handle/10219/2146.

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This thesis investigates the development of an automated fault detection system developed for a novel lightweight railway material haulage system; in particular, the study aims to detect railway track faults at the incipient stage to determine the feasibility of maintenance decision support, ultimately with the function of preventing catastrophic failure. The proposed approach is an extension of the current state of the art in fault detection of unsteady machinery. The most common railway track faults associated with train derailment were considered; namely, horizontal and transverse crack pro

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Svedberg, Victoria. "Towards optimal railway track utilization based on societal benefit." Licentiate thesis, Linköpings universitet, Kommunikations- och transportsystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150995.

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Infrastructure managers in railway systems are striving to have as efficient track utilization as possible. There are no unanimous interpretation of efficiency in terms of track utilization, but the aim of the Swedish Transport Administration is to allocate track capacity such that societal beneﬁt is maximized. This means that the tracks should be used by as much traffic as possible and by traffic that provides as much benefit for the society as possible. To allocate track capacity such that the track utilization is optimal would be an easy task if the track capacity were not a scarce resource

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Oliveira, Elias Silva. "Solving single-track railway scheduling problem using constraint programming." Thesis, University of Leeds, 2001. http://etheses.whiterose.ac.uk/1297/.

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The Single Track Railway Scheduling Problem can be modelled as a special case of the Job-Shop Scheduling Problem. This can be achieved by considering the train trips as jobs, which will be scheduled on tracks regarded as resources. A train trip may have many tasks that consist of traversing from one point to another on a track. Each of these distinct points can be a station or a signal placed along the track. Conflicts may occur when the desired timetable would result in two trains occupying the same section of the track at the same time. The mapping of the problem we have proposed in this the

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Handstanger, Anne Christine Torp. "Scheduled waiting time from crossing on single track railway lines." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-5779.

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For the long term planning of railway infrastructure several analyses are necesarry. One of them is the prognosticated demand for future railway transportation. This information serves as input parameter for the capacity and benefit cost analysis. For the capacity analysis, timetable independent analytical methods that can estimate the scheduled waiting time in dependency of the number of trains running on the line is required. If the scheduled waiting time is too long, the operators risk losing customers and the infrastructure operators risk losing the operators as customers. Changes must be

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Berggren, Eric. "Railway Track Stiffness : Dynamic Measurements and Evaluation for Efficient Maintenance." Doctoral thesis, KTH, Farkost och flyg, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10360.

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Railway track stiffness (vertical track load divided by track deflection) is a basic parameter oftrack design which influences the bearing capacity, the dynamic behaviour of passing vehiclesand, in particular, track geometry quality and the life of track components. Track stiffness is abroad topic and in this thesis some aspects are treated comprehensively. In the introductionpart of the thesis, track stiffness and track stiffness measurements are put in their propercontext of track maintenance and condition assessment. The first aspect is measurement of track stiffness. During the course of t

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Skoglund, Kjell Arne. "A Study of some Factors in Mechanistic Railway Track Design." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-103.

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<p>This thesis is composed of three main parts: The first part that uses classic track models as a basis for further developments, the second part that deals with constitutive behaviour of granular materials and the third part that describes the development of a new triaxial cell apparatus and the testing of a ballast material using this apparatus.</p><p>The description of classic track models is focused on the beam-on-elastic-foundation model (abbr. BOEF model), which make use of the Winkler foundation, and a simple beam element model with linear discrete support. The shortcomings of the BOEF

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Calla, Chaitanya. "Two layered ballast system for improved performance of railway track." Thesis, Coventry University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402705.

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Yeung, Ngai-hang Ian, and 楊毅恆. "Sound on track: study of railway noise in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31254457.

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Fair, Peter. "The geotechnical behaviour of ballast materials for railway track maintenance." Thesis, University of Sheffield, 2004. http://etheses.whiterose.ac.uk/3543/.

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The search for an improved mechanised method of maintaining railway track to the correct level and alignment led to the development of the stoneblower, a machine that lifts the rail and attached sleepers and pneumatically injects the required amount of 20mm stone into the void created, creating a two-layer granular foundation. Stoneblowing minimises disturbance to the existing well-compacted ballast and reduces the amount of particle breakage normally associated with maintenance. By 1999 a fleet of stoneblowers was fully operational across the UK rail network and achieving target rates of trac

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45

Tunna, John. "Fatigue design of railway vehicles for track induced random forces." Thesis, Open University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278285.

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46

Yeung, Ngai-hang Ian. "Sound on track : study of railway noise in Hong Kong /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21301530.

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Carpenter, David C. "Investigation into track parameters for simulation of electrified railway systems." Thesis, University of Bath, 1993. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332948.

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48

Majala, Jonas. "Interpretation of Railway Track Alignment Measurements in a Geodynamic Perspective." Licentiate thesis, Luleå tekniska universitet, Geoteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-83499.

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Mones, Ruiz Martin Alejandro. "A mechanistic-empirical method for characterisation of railway track formation." Diss., University of Pretoria, 2009. http://hdl.handle.net/2263/67816.

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The demand on South African railway freight lines is growing constantly with respect to train speeds and axle loading, thus increasing the forces and stresses experienced by the track structure. This may lead to rapid track deterioration as a result of a loss in track geometry caused by the poor and nonuniform underlying support. The railway engineering industry has moved towards gaining a better understanding of track formation behaviour for development of practical and effective deflection measurement techniques that allow accurate determination of formation structural capacity, identi

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Gong, Cencen. "The interaction between railway vehicle dynamics and track lateral alignment." Thesis, University of Huddersfield, 2013. http://eprints.hud.ac.uk/id/eprint/19755/.

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This thesis examines the effect of vehicle dynamics on lateral deterioration of the track alignment. As rail traffic runs along a route, the forces imposed upon the track cause the ballast to settle, and hence the track geometry deteriorates. At a specified value of deterioration the track geometry needs to be restored by tamping or other methods. As the deterioration is mainly in the vertical direction, this aspect has been more widely studied and models have been developed to predict vertical track geometry deterioration. On the other hand, lateral track deterioration is not as well understo

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