O propósito desta dissertação consiste em realizar um estudo do comportamento dinâmico lateral da caixa de um veículo ferroviário. Inicialmente fez-se uma abordagem do estado da arte referente à utilização de suspensões pneumáticas, sobre o funcionamento de sistemas de nivelamento, flexibilidade de caixas em análise dinâmica e irregularidades de vias férreas. Em seguida, definiu-se um modelo físico de um veículo ferroviário e, após determinadas simplificações, chegou-se a um sistema de nove graus de liberdade composto de uma caixa e dois truques de um rodeiro cada. Uma vez deduzidas as equações diferenciais de movimento, desenvolveram-se duas soluções capazes de fornecer resultados temporais e no domínio da freqüência. Através da primeira delas, a solução analítica, obtêm-se as respostas em freqüência e temporal dos movimentos lateral, roll e yaw da caixa para excitações de rotação longitudinal dos rodeiros. O segundo tipo de solução, por integração numérica, possui como excitações de entrada os deslocamentos verticais e rotacionais dos rodeiros e, como saídas, os movimentos nos nove graus de liberdade definidos para o sistema. Outra propriedade da solução por integração numérica é sua capacidade de simular suspensões secundárias lineares e não lineares. O artigo \"Manchester Benchmarks for rail vehicle simulation\" (IWNICKI, 1999) forneceu os parâmetros que definem o veículo e os princípios de irregularidades da via. Três tipos de comparações foram conduzidas, na primeira delas os resultados da análise modal deste trabalho foram confrontados com os resultados publicados pelos participantes do Benchmark e a proximidade entre eles permite fazer sua validação. O segundo tipo de comparação foi feito entre os resultados temporais das soluções analítica e por integração numérica e, o terceiro, entre simulações por integração numérica utilizando suspensões secundárias lineares e não lineares. Neste último caso, os resultados mostram que a linearização das suspensões secundárias podem ser feitas sem que haja diferenças significativas uma vez que os deslocamentos e ângulos são pequenos. Finalmente, elaborou-se uma análise para verificar a influência da variação da rigidez vertical das suspensões secundárias nas amplitudes, acelerações e no valor médio quadrático da aceleração (rms) dos movimentos laterais da caixa no domínio da freqüência. Os resultados obtidos permitem dizer que para a faixa de freqüência de maior sensibilidade do ser humano às vibrações laterais, entre 0,5 Hz e 2 Hz segundo a norma ISO 2631, há uma redução das vibrações dos movimentos lateral e roll da caixa, quando tais rijezas são reduzidas. Porém, as conseqüências da variação deste parâmetro nos demais modos de vibrar e na estabilidade do veículo constituem um estudo que pode ser realizado em um trabalho futuro. / This master\'s thesis aims at studying the lateral dynamic behavior of a railway vehicle\'s bodyshell. First is examined the state of the art related to the use of pneumatic suspensions, to leveling systems\' operation, to carbody flexibility\'s dynamic analysis and to railway\'s irregularities. The definition of the physical modeling of rail vehicle is carried out, followed by a number of simplifications, from which is defined a system with nine degrees of freedom, made up of a carbody and two bogies with one wheelset each. Once the motion\'s differential equations are defined, two solutions are carried out, capable of producing results in both time and frequency domains. The first one enables to display time and frequency responses of the carbody lateral displacement, roll and yaw for longitudinal rotation excitations of the wheelsets. The second type of solution that is obtained through numerical integration, deals with rolling and vertical displacement of the wheelsets as input data, and outputs the movements of the nine degrees of freedom defined for the system. The numerical integration solution also has the advantage of being capable of simulating linear as well as non linear secondary suspensions. The article \"Manchester Benchmarks for rail simulation\" (IWNICKI, 1999) provides the parameters that define the vehicle and the irregularities\' principles of the railway. Three types of comparisons were carried out. In the first, the results of this work\'s modal analysis were confronted to the results published by the participants of the benchmark, and the proximity of them was worth validation. The second type of comparison was made between the time domain results of both analytic and numerical integration solutions, and the third between numerical integration simulations using linear and non linear secondary suspensions. This last comparison show that the linearization of secondary suspensions can be done without afecting the results for small displacements and angles. Finally, an analysis is made up so as to verify how the vertical stiffness of secondary suspension affects the lateral displacement, acceleration and the rootmean-square (rms) accelerations of the carbody in frequency domain. The result of this work allows concluding that in the frequency range of maximal sensibility to the human being to lateral vibrations, that is between 0.5 Hz and 2 Hz according to ISO263-1, a decrease of the lateral and roll vibrations of the carbody occurs when this stifness is reduced. However this parameter\'s variations consequences on other vibration modes and on the vehicle stability could be analyzed in greater depth in a future study.

Uma ocorrência ferroviária tem danos imprevisíveis, desde um simples atraso do horário do trem enquanto o socorro ferroviário encarrilha o vagão, até prejuízos milionários com grande perda de ativos (material rodante e via permanente) e, em casos extremos, até vidas humanas. Portanto, as ferrovias nacionais sempre buscam maneiras de programar ações que minimizam este risco. Uma das principais ações é estabelecer critérios de manutenção sempre justos. Entretanto, estes critérios geralmente não contemplam de maneira conjunta a dinâmica veicular e a geometria da via permanente. Neste sentido, este trabalho elabora um modelo matemático de um vagão ferroviário de alta capacidade em conjunto com a flexibilidade do suporte da via permanente. O modelo matemático foi validado e considerado satisfatório, a partir da comparação das frequências naturais obtidas no vagão real e na comparação de seu resultado produzido a partir de uma entrada medida com equipamentos de controle de geometria de linha e de medições dinâmicas realizadas por vagão instrumentado. Um método estratégico para análise da segurança do veículo foi sugerida e utilizada mostrando-se capaz de determinar os comprimentos de onda da via permanente que devem ser priorizados na manutenção, bem como na análise da segurança do vagão quando na adoção de restrições de velocidades. / A railway derailment is usually an unpredictable, damage from a simple train delay of to a big goods loss of assets (rolling stock and permanent way) and, in extremely cases, even human lives. Therefore, the Brazilians railways are always implementing actions that minimize this risk of a derailment. One of the main actions is to establish tight maintenance criteria. However, these usually do not consider the vehicle dynamics and the geometry of the permanent way together. Thus, this paper develops a mathematical model of a high capacity railcar together with the flexibility of the support of the permanent way. The mathematical model was validated and considered satisfactory, by comparing the natural frequencies obtained between the model and a real vehicle tested in the field. In addition, the model results were compared against filed measurements of an instrumented wagon and a track geometric data. A strategic method to analysis the operational safety analysis was suggested and used proving to be able to determine the wavelength of the permanent way that should be prioritized in the maintenance action as well as when adopting speed restriction.

Este trabalho teve como objetivo principal a estimativa de demanda de carga captável pela Estrada de Ferro Norte-Sul. A análise da quantidade de carga com aptidão para movimentação através do trecho ferroviário foi realizada com o auxílio de um modelo linear de otimização de fluxos em rede. Referenciando-se na abordagem teórica dos modelos de Equilíbrio de Fluxos em Rede propôs-se o uso de um modelo de transporte para quantificar o volume de carga captável pela ferrovia. Os resultados obtidos indicaram fluxos que somam aproximadamente 1,5 milhão de toneladas de cargas através da ferrovia, considerando o ano base de 2005 e a malha ferroviária correspondente ao trecho que se encontra atualmente em operação, que liga Estreito (MA) até São Luís (MA), através da Estrada de Ferro Carajás. Quando se analisou o impacto da expansão da Estrada de Ferro Norte-Sul até Senador Canedo (GO), a demanda de carga captável alcançou 3,1 milhões de toneladas. A análise dos resultados auxiliou na identificação dos principais centróides geradores de carga para a ferrovia, os pontos de transbordo mais representativos da malha e os principais produtos com potencial de movimentação no trecho ferroviário, revelando que o modelo proposto pode ser utilizado como uma importante ferramenta de suporte às atividades relacionadas ao planejamento estratégico de sistemas de transportes. / The main goal of this thesis was to estimate the freight demand for Brazil\'s North-South Railway. The evaluation of the amount of cargo that could be attracted by the railway was done through the use of a linear optimization network flow model. During 2005, the results showed a total of 1.2 million tons of inter-reginal flows that have potential to be moved through the rail branch line between Estreito (MA) and São Luís (MA). When the freight demand was measured for the total extension of the railway that is planned to connect Senador Canedo (GO) to São Luís (MA) the total load reached 3.0 million tons. This model has shown to be a practical tool for evaluating the potential flows trough a transportation infrastructure and for identifying the origins and routes related to these flows. The present research also offers valuable inputs for transportation strategic planning.

by Kong Kang Chuen, Lau Tai Wing, Dwight. / Thesis (M.B.A.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (leaf 55). / ABSTRACT --- p.iii / TABLE OF CONTENTS --- p.v / LIST OF ILLUSTRATIONS --- p.vi / LIST OF TABLES --- p.vii / Chapter / Chapter I. --- INTRODUCTION --- p.1 / Chapter II. --- FINANCIAL PERFORMANCE OF MTRC --- p.8 / Chapter III. --- MTRC PRIVATIZATION PLAN --- p.15 / Chapter IV. --- OVERSEAS EXPERIENCES IN RAILWAY PRIVATIZATION --- p.20 / Chapter V. --- FINANCIAL IMPACTS OF THE PRIVATIZATION --- p.27 / Chapter VI. --- SOCIAL IMPACTS OF THE PRIVATIZATION --- p.36 / Chapter VII. --- CONCLUSIONS --- p.40 / Appendix / Chapter I. --- FINANCIAL SUMMARY OF THE MTRC (1996-1998) --- p.43 / Chapter II. --- STANDARD & POORS REPORT ON THE PASSAGE OF MTR BILL REGARDING PRIVATIZATION --- p.45 / Chapter III. --- "LegCo PANEL ON TRANSPORT, OVERSEAS EXPERIENCE IN THE PRIVATIZATION OF RAILWAYS" --- p.47 / BIBLIOGRAPHY --- p.54

Dans l’immense catalogue des travaux consacrés à l’étude des chemins de fer, cette thèse prétend àune certaine originalité en abordant la question des fonctions et des usages de la comptabilitéferroviaire. Cette question s’inscrit dans un cadre plus global d’étude des pratiques comptables desentreprises de réseau. Appliquée aux compagnies de chemin de fer des origines à 1937, notre étudea pour ambition d’identifier les facteurs de contingence et d’évolution de la comptabilité ferroviaire.À ce dessein, nous avons mobilisé les travaux de Flichy pour dépasser le déterminisme desprincipaux paradigmes en histoire de la comptabilité. Les résultats de cette étude montrent que lesfonctions explicites de la comptabilité ne correspondent pas souvent à ses usages sociaux. Desfacteurs de contingence sont identifiés pour expliquer la divergence des usages de la comptabilitépar les différents acteurs du secteur ferroviaire. Cette étude a permis également d’identifier troisrégimes majeurs dans l’évolution des savoirs théoriques et pratiques en matière de comptabilitéferroviaire. Le premier régime de la pratique (1817-1842) est caractérisé par la diversité despratiques comptables et l’inexistence d’un savoir théorique structuré. Le deuxième régime de latechnique (1842-1883) est caractérisé par des phénomènes de mimétismes et de recherche de lameilleure méthode comptable. Enfin, le troisième régime de la technologie (1883-1937) secaractérise par une rigueur méthodologique et scientifique, notamment à travers l’introduction de laformation et l’enseignement, dans l’élaboration des règles comptables. / In the vast catalog of works devoted to the study of railways, this thesis claims to originality inapproaching the question of the functions and uses of the railway accounting. This question is part ofa more comprehensive study of accounting practices within network industries. Applied to railwaycompanies from origins to 1937, this study aims to identify contingency factors and development ofrailway accounting. For this purpose, we mobilized Flichy work to overcome the determinism of themain paradigms in accounting history. The results of this study show that the explicit functions ofaccounting often do not correspond to its social (implicit) uses. Contingency factors were identifiedto explain the divergent uses of accounting by the stakeholders operating in the railway sector. Thisstudy also identified three major periods in the development of theoretical and practical knowledge inrailway accounting. The first period of practice (1817-1842) is characterized by the diversity ofaccounting practices and the lack of a structured theoretical knowledge. The second period oftechnique (1842-1883) is characterized by the phenomenon of mimicry and search for the bestaccounting method. The third regime of evolution, technology (1883-1937), is characterized bymethodological and scientific rigor, notably through the introduction of training and education in thedevelopment of accounting rules.

by Leung Ka Lai, Keane. / Thesis (M.B.A.)--Chinese University of Hong Kong, 1998. / Includes bibliographical references (leaves 109-111). / ABSTRACT --- p.ii / TABLE OF CONTENTS --- p.iii / LIST OF ILLUSTRATIONS --- p.vi / LIST OF TABLES --- p.vii / ACKNOWLEDGEMENT --- p.viii / Chapter / Chapter I. --- INTRODUCTION --- p.1 / Corporate Profile --- p.1 / Company Background --- p.1 / System Information --- p.2 / Operating Information --- p.3 / Benchmarking - A Historical Overview --- p.4 / First Generation - Reverse Engineering --- p.6 / Second Generation - Competitive Benchmarking --- p.6 / Third Generation ´ؤ Process Benchmarking --- p.7 / Fourth Generation - Generic Benchmarking --- p.8 / Fifth Generation - Global Benchmarking --- p.9 / Development of Benchmarking in MTRC --- p.10 / Local Benchmarking --- p.11 / International Benchmarking --- p.11 / Purposes of the Research --- p.12 / Chapter II. --- METHODOLOGY --- p.13 / Literature Review --- p.13 / Information Gathering --- p.13 / Review and Analysis --- p.14 / Discussions and Conclusions --- p.14 / Chapter III. --- LITERATIVE REVIEW --- p.15 / Definition of Benchmarking --- p.15 / Why Benchmarking ？ --- p.16 / Types of Benchmarking --- p.20 / Benchmarking and other modern management concepts --- p.22 / Benchmarking and Total Quality Management --- p.22 / Benchmarking and Learning Organisations --- p.24 / "Benchmarking, Total Quality Management and Learning Organisations" --- p.28 / Benchmarking and Business Process Re-engineering --- p.29 / Benchmarking and Strategic Planning --- p.31 / The Benchmarking Code of Conduct --- p.40 / The Benchmarking Process --- p.44 / Benchmarking in the Public Sector --- p.47 / Worldwide Trend of Benchmarking --- p.51 / Development in North America --- p.51 / Development in Europe --- p.53 / Development in the Pacific Rim --- p.54 / The Future --- p.56 / Summary --- p.57 / Chapter IV. --- THE INTERNATIONAL BENCHMARKING EXPERIENCE IN MTRC --- p.61 / The Threats faced by MTRC --- p.61 / Objectives --- p.62 / The Process --- p.63 / Design Key Performance Indicators --- p.65 / Prepare Data Collection Instrument --- p.67 / Analyse the Collected Data --- p.70 / Conclusions and Recommendations --- p.71 / Confidential and Security Issues --- p.74 / Summary --- p.75 / Chapter V. --- A PROCESS BENCHMARKING CASE STUDY AMONG TWO METROS --- p.77 / Background --- p.77 / Objectives --- p.77 / The Process --- p.78 / Identify and map key processes --- p.79 / Prioritize and select key processes --- p.80 / Analyse selected process areas --- p.81 / Identify key measures --- p.83 / Collect and compare data --- p.84 / Ideas for improvement --- p.85 / Plan implementation --- p.87 / Summary --- p.88 / Chapter VI. --- GENERAL DISCUSSIONS --- p.90 / Identifying strength and weaknesses --- p.90 / Learning from best practices --- p.91 / Better performance measurement --- p.92 / Valuable relationship for continuous improvement --- p.97 / Implementation issues --- p.97 / Chapter VII. --- CONCLUSIONS --- p.102 / APPENDIX --- p.108 / BIBLIOGRAPHY --- p.109

Reliable wireless networks for high speed trains require a significant amount of data communications for enabling safety features such as train collision avoidance and railway management. Cognitive radio integrates heterogeneous wireless networks that will be deployed in order to achieve intelligent communications in future railway systems. One of the primary technical challenges in achieving reliable communications for railways is the handling of high mobility environments involving trains, which includes significant Doppler shifts in the transmission as well as severe fading scenarios that makes it difficult to estimate wireless spectrum utilization. This thesis has two primary contributions: (1) The creation of a Heterogeneous Cooperative Spectrum Sensing (CSS) prototype system, and (2) the derivation of a Long Term Evolution for Railways (LTE-R) system performance analysis. The Heterogeneous CSS prototype system was implemented using Software-Defined Radios (SDRs) possessing different radio configurations. Both soft and hard-data fusion schemes were used in order to compare the signal source detection performance in real-time fading scenarios. For future smart railways, one proposed solution for enabling greater connectivity is to access underutilized spectrum as a secondary user via the dynamic spectrum access (DSA) paradigm. Since it will be challenging to obtain an accurate estimate of incumbent users via a single-sensor system within a real-world fading environment, the proposed cooperative spectrum sensing approach is employed instead since it can mitigate the effects of multipath and shadowing by utilizing the spatial and temporal diversity of a multiple radio network. Regarding the LTE-R contribution of this thesis, the performance analysis of high speed trains (HSTs) in tunnel environments would provide valuable insights with respect to the smart railway systems operating in high mobility scenarios in drastically impaired channels.

Submitted by JOSIANE SANTOS DE OLIVEIRA (josianeso) on 2017-12-13T15:44:41Z No. of bitstreams: 1 Cinara Isolde Koch Lewinski_.pdf: 28732504 bytes, checksum: 8f23811a24a0391a58d316f45615d553 (MD5) / Made available in DSpace on 2017-12-13T15:44:41Z (GMT). No. of bitstreams: 1 Cinara Isolde Koch Lewinski_.pdf: 28732504 bytes, checksum: 8f23811a24a0391a58d316f45615d553 (MD5) Previous issue date: 2017-10-23 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / PROSUP - Programa de Suporte à Pós-Gradução de Instituições de Ensino Particulares / Esta dissertação tem por objetivo analisar o discurso produzido pelo Centro de Preservação do Patrimônio Histórico Ferroviário no Rio Grande do Sul na década de 1980. O tema surgiu da necessidade de se desenvolver um estudo sobre o patrimônio cultural ligado ao Museu do Trem, a partir das carências constatadas mediante o exame da documentação pertinente ao assunto. Sendo assim, o Museu do Trem, antiga Estação Ferroviária de São Leopoldo, passou a ser o nosso objeto de pesquisa, pois, abrigou o Centro de Preservação da História Ferroviária do nosso Estado. A pesquisa é embasada teoricamente na história cultural e a metodologia sobre o estudo do Programa de Preservação do Patrimônio Histórico está concentrada em dois focos: na pesquisa documental e na pesquisa que abrange as fontes testemunhais em um exercício de microanálise. Por meio dessas fontes, pretendemos analisar as políticas patrimoniais em torno do Programa de Preservação do Patrimônio Histórico, seus objetivos, seus interesses e o que buscou preservar do patrimônio ferroviário no Rio Grande do Sul, além de verificar a trajetória do Programa em nosso Estado, na década de 1980. Portanto, este trabalho tem a pretensão de contribuir para os estudos sobre a constituição do patrimônio ferroviário gaúcho e para as discussões sobre as relações entre poder político, patrimônio cultural e memória ferroviária. / This theme aims to analyze the discourse produced by Rio Grande do Sul Preservation Center of Railway Heritage in the 1980s. This work came from the need to develop a study on the cultural heritage linked to the Train Museum, from the shortcomings found by examining the documentation relevant to the subject. As such, Train Museum, formerly São Leopoldo Railway Station, became our object of research, as it housed the Preservation Center of Railway History of our State. The research is based theoretically on cultural history and the methodology on the study of the Heritage Preservation Program is concentrated in two focuses: documentary research and research that covers the sources of witness in a microanalysis exercise. With these sources, we intend to analyze the patrimonial policies around the Program of Preservation of the Historical Patrimony, its objectives, its interests and what it tried to preserve of the rail patrimony from Rio Grande do Sul, and moreover checking the trajectory of Program in our State, in that decade. Therefore, this work intends to contribute to the studies on the constitution from gaucho rail heritage and to the discussions about relations between political power, cultural heritage and railway memory.

A utilização majoritária da malha ferroviária brasileira para o transporte de cargas e a sua incompatibilidade para desenvolvimento de altas velocidades inviabiliza a oferta de serviços competitivos para o transporte intermunicipal de passageiros. A questão explorada nesta tese é sobre qual tecnologia ferroviária provê melhores resultados socioeconômicos no contexto de uma nova rede para o transporte intermunicipal de passageiros com operação exclusiva de Trens de Alto Desempenho (High Performance Trains - HPTs) ou Trens de Alta Velocidade (High Speed Trains - HSTs), caracterizados por velocidades médias de 150 km/h e 300 km/h respectivamente. Nesse sentido, a hipótese é que a diferença entre benefícios e custos socioeconômicos da oferta de serviços de HSTs resultam em valores positivos e maiores do que aquelas decorrentes da operação de HPTs, mediante parâmetros específicos de avaliação socioeconômica e uma configuração hipotética de rede na Região Sudeste do Brasil. Assim, o objetivo principal da tese é estimar e comparar os custos e benefícios socioeconômicos de uma rede ferroviária pela estimativa dos investimentos para a construção de novos traçados ferroviários, estimativa do número de viagens intermunicipais na Região Sudeste em um horizonte de planejamento estratégico e a propensão à escolha modal, estabelecimento de uma formulação de Análise Custo-Benefício (Cost Benefit Analysis - CBA) e aplicação dos modelos em cenários considerando a operação exclusiva de HPTs ou de HSTs. A resolução do problema de otimização de traçados ferroviários, com uma abordagem de computação paralela aplicada a um Algoritmo Genético, indica que os investimentos em infraestrutura variam majoritariamente em função da topografia, os custos de desapropriações são proporcionalmente pequenos e as restrições geométricas dos traçados não influenciam significativamente nesses resultados. Após a projeção do número de viagens intermunicipais por modelos analíticos, os dados coletados em uma pesquisa de preferência declarada são utilizados para modelagem da propensão à escolha modal. Finalmente, uma proposta de formulação para o cálculo dos principais itens de custos e benefícios de uma avaliação socioeconômica para o transporte ferroviário de passageiros viabiliza a análise de cenários em função de produtividade da construção da infraestrutura, variabilidade dos investimentos estimados e capacidade de atração de demanda reprimida. Os resultados dos cenários indicam que a diferença entre os benefícios estritamente econômicos (receita operacional e valor residual dos investimentos em infraestrutura) e os custos de construção e operacionais são negativos para qualquer tarifa ferroviária, apesar dos resultados para a rede de HSTs serem maiores do que para a de HPTs. Considerando os aspectos sociais, os benefícios totais da operação ferroviária sobrepõem-se aos seus custos em situações tarifárias específicas, novamente com resultados maiores para uma rede de HSTs, cuja tendência também é observada quando apenas os benefícios sociais são relacionados com custos totais através de uma Razão Benefício-Custo (Benefit-Cost Ratio - BCR). Portanto, segundo as premissas desta tese, há indícios que o investimento em uma infraestrutura ferroviária aparentemente não é uma decisão promissora em termos de viabilidade socioeconômica, apesar da operação de HSTs ser mais conveniente do que HPTs nas condições analisadas. / The major use of the Brazilian railway network for freight transport and its incompatibi-lity with high speed trains does not enable running competitive services of intercity passenger transport. The research question of this thesis is which rolling stock technology provides better socioeconomic results on a new intercity passenger network with exclusive operation of High Performance Trains (HPTs) or High Speed Trains (HSTs) with average speeds of 150 km/h and 300 km/h respectively. The hypothesis is that the difference between the socioeconomic benefits and costs of operating HSTs results in positive values and greater than those from the operation of HPTs given specific socioeconomic parameters and a hypothetical network in the Southeastern region of Brazil. The main goal of this research is to estimate and compare the major socioeconomic costs and benefits of a hypothetical railway network by first estimating the required investments of new alignments. Furthermore, the number of trips among cities in the Southeastern Region over a strategic planning horizon and the mode choice are estimated and a Cost-Benefit Analysis formulation is provided to be applied to scenarios of exclusive operation of HPTs or HSTs. The solution of the railway alignment optimization problem with a parallel computing approach applied to a Genetic Algorithm shows that the infrastructure investments vary mainly due to the topography, whereas the expropriation costs are proporti-onally small and the railway geometric constraints do not significantly affect the results. The number of trips by transport mode over a planning horizon is expanded analytically and the collected data of a stated preference survey is applied to a mode choice modeling approach. Finally, a formulation for the major items of costs and benefits of a socioeconomic assessment for a rail passenger transport project is proposed and it is applied to specific scenarios where the effects of the infrastructure building productivity, variability of the estimated investments, and the ability to attract new passengers are analyzed. The results from these scenarios show that the difference between the operating income and the net residual value of investments in infrastructure, construction and operating costs are negative for any rail fare, despite the results for the network of HSTs being higher than for HPTs. Furthermore, the overall benefits of the railway operation outweigh the costs in specific pricing policies with better results for a network operating HSTs. This trend is also noticed when only the social benefits are compared to the total costs by a Benefit-Cost Ratio (BCR). Therefore, there is evidence that the investment in railway infrastructure for passenger transport apparently is not a promising decision in terms of socioeconomic feasibility under the assumptions of this thesis, despite the operation of HSTs being more attractive than HPTs under the specified conditions.

La réponse dynamique d’un train roulant sur une voie réelle dépend de plusieurs paramètres. Certains d’entre eux ne peuvent pas être correctement identifiés et doivent être considérés comme incertains. L’objectif de cette thèse est la construction d’un modèle probabiliste de la fatigue du rail, en considérant la géométrie de la voie et l’usure des rails comme champs aléatoires modélisés en utilisant le développement de Karhunen-Loève. Ce dernier requiert le calcul des fonctions et des valeurs propres de l’opérateur de covariance pour la représentation modale du champ. Cette étape peut devenir très coûteuse si le domaine est beaucoup plus grand que la longueur de corrélation. Pour résoudre ce problème, une adaptation de la technique est proposée. Les distributions multivariées des coefficients de projection sont identifiées à l’aide d’un développement en Chaos Polynomiaux, qui est calibré sur des données de mesures. Le rayon de courbure, l’âge du rail et la vitesse opérationnelle du train induisent des effets non stationnaires qui doivent être pris en compte dans le modèle. La validation du modèle probabiliste des quantités d’entrée est faite en comparant des données de mesure des efforts de contact roue-rail avec les résultats des simulations. Une analyse de sensibilité globale est menée sur des quantités d’intérêts dynamiques pour quantifier l’impact des irrégularités aléatoires sur la dynamique du véhicule et l’initiation à fatigue du rail. / The dynamical response of a train rolling on a real track depends on several parameters. Most of them cannot be accurately identified and have to be considered as uncertain. The aim of this thesis is the construction of a probabilistic model of the rail fatigue life considering the track geometry and the rail wear as random fields modelled with the Karhunen-Loève expansion. This latter requires the modal decomposition of the covariance operator. This step can be very expensive if the domain if much larger than the correlation length. To deal with this issue, an adaptation of the KLE, consisting in splitting the domain in sub-domains where this modal decomposition and the sample generation can be comfortably computed, is proposed. A correlation between the KLE coefficients of each sub-domain is imposed to ensure the desired correlation structure. The multivariate distributions of the random projection coefficients are characterized using a Polynomial Chaos Expansion (PCE) calibrated on measurements data of the track irregularities. The curve radius, the rail age and the train operational velocity introduce nonstationary effects that have to be taken into account to model the track. A validation of the random models is therefore performed using a set of measurements of the wheel-rail contact forces.A global sensitivity analysis is performed on some dynamical quantities of interest in order to quantify the impact of the random fields on the vehicle dynamics and the rail fatigue initiation. Since this step is computationally expensive, a PCE-based meta-modelling technique is employed to estimate the fatigue index.