Download or read book COMPORTEMENT TRANSVERSAL D UN VEHICULE FERROVIAIRE EN ALIGNEMENT ET EN COURBE NOUVELLES TECHNOLOGIES DES BOGIES ETUDE COMPARATIVE written by CHRISTOS.. PYRGIDIS and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LES ETUDES SCIENTIFIQUES, DEVELOPPEES DANS CETTE THESE ONT PERMIS DE METTRE AU POINT DES MODELES MATHEMATIQUES SIMULANT EN ALIGNEMENT ET EN COURBE, LE COMPORTEMENT TRANSVERSAL D'UN VEHICULE FERROVIAIRE MUNI DE BOGIES AYANT LES TECHNOLOGIES CI-APRES: BOGIES CONVENTIONNELS A ESSIEUX CLASSIQUES, BOGIES A ESSIEUX AUTO-ORIENTES, BOGIES A ESSIEUX A PSEUDOGLISSEMENT CONTROLE, BOGIES A ESSIEUX A ROUES INDEPENDANTES. A PARTIR DE CES MODELES ON A ETUDIE: A) LA STABILITE TRANSVERSALE DU VEHICULE DANS LE CAS D'UNE CIRCULATION A VITESSE CONSTANTE, SUR UNE VOIE EN ALIGNEMENT DE BONNE QUALITE SITUEE DANS UN PLAN HORIZONTAL. LE GUIDAGE DES ESSIEUX EST ASSURE UNIQUEMENT PAR LES FORCES DE PSEUDOGLISSEMENT ET LA GEOMETRIE DE CONTACT; B) LE COMPORTEMENT SEMI-STATIQUE DU VEHICULE DANS LE CAS D'UNE CIRCULATION A VITESSE CONSTANTE DANS UNE COURBE DE RAYON DONNE AVEC INSUFFISANCE DE DEVERS, ET; C) ON A COMPARE LES PERFORMANCES OBTENUES DANS LES TECHNOLOGIES CONSIDEREES. AVEC DES BOGIES A ESSIEUX A PSEUDOGLISSEMENT CONTROLE ET A ROUES INDEPENDANTES, ON PEUT OBTENIR: SANS DISPOSITIFS ANTI-LACET ET INDEPENDAMMENT DE L'USURE DES ROUES, DES VITESSES CRITIQUES EN ALIGNEMENT TRES ELEVEES SUPERIEURES A 500 KM/H, UNE REDUCTION DES EFFORTS DE GUIDAGE DANS LES COURBES DE FAIBLE RAYON, ET UN MEILLEUR COMPORTEMENT DES ESSIEUX DANS LES COURBES DE GRAND RAYON

Download or read book Railway Transportation Systems written by Christos N. Pyrgidis and published by CRC Press. This book was released on 2016-04-21 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Incorporates More Than 25 Years of Research and ExperienceRailway Transportation Systems: Design, Construction and Operation presents a comprehensive overview of railway passenger and freight transport systems, from design through to construction and operation. It covers the range of railway passenger systems, from conventional and high speed inter

Download or read book Rail International written by and published by . This book was released on 1996 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ETUDE DE LA STABILITE TRANSVERSALE EN ALIGNEMENT ET DU COMPORTEMENT EN COURBE D UN VEHICULE FERROVIAIRE written by HABIB.. BETTAIEB and published by . This book was released on 1983 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DE LA STABILITE TRANSVERSALE EN ALIGNEMENT ET DU COMPORTEMENT EN COURBE D'UN VEHICULE FERROVIAIRE. LA 1ERE PARTIE COMPREND 2 CHAPITRES QUI FOURNISSENT LES ELEMENTS DE BASE POUR L'ETUDE DE LA STABILITE TRANSVERSALE D'UN VEHICULE. LA 2EME PARTIE ETUDIE LA STABILITE TRANSVERSALE DE DIFFERENTS SYSTEMES MECANIQUES REPRESENTANT DES VEHICULES DE COMPLEXITE CROISSANTE. LA 3EME PARTIE S'INTERESSE AU MOUVEMENT D'UN VEHICULE EN COURBE

Download or read book Stabilit transversale en alignement d un v hicule ferroviarre written by Ecole nationale des ponts et chaussées (France). Projet de Fin d'Etudes and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Railway Management and Engineering written by V Profillidis and published by Routledge. This book was released on 2017-11-30 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a rapidly changing world, with increasing competition in all sectors of transportation, railways are in a period of restructuring their management and technology. New methods of organization are introduced, commercial and tariff policies change radically, a more entrepreneurial spirit is required. At the same time, new high-speed tracks are being constructed and old tracks are renewed, high-comfort rolling stock vehicles are being introduced, logistics and combined transport are being developed. Awareness of environmental issues and search for greater safety give to the railways a new role within the transportation system. Meanwhile, methods of analysis have significantly evolved, principally due to computer applications and new ways of thinking and approaching old problems. Therefore it becomes necessary to come up with a new scientific approach to tackle management and engineering aspects of railways, to understand in-depth the origins and inter-relationships of the various situations and phenomena and to suggest the appropriate methods and solutions to solve the various emerging problems. This book aims to cover the need for a new scientific approach for railways. It is written for railway managers, economists and engineers, consulting economists and engineers, students of schools of engineering, transportation and management. The book is divided into three distinct parts: Part A deals with the management of railways, Part B deals with the track and, Part C deals with rolling stock and environmental topics. Each chapter of the book contains the necessary theoretical analysis of the phenomena studied, the recommended solutions, applications, charts and design of the specific railway component. In this way, both the requirement for a theoretical analysis is met, and the need of the railway manager and engineer for tables, nomographs, regulations, etc. is satisfied. Railways in Europe have separated activities of infrastructure from those of operation. In other parts of the world, however, railways remain unified. The book addresses both situation. Railways present great differences in their technologies. Something may be valid for one such technology, but not for another. To overcome this problem, regulations of the International Union of Railways (UIC) as well as European Standardization (CEN) have been used to the greatest extent possible. Whenever a specific technology or method is presented, the limits of its application are clearly emphasized.

Download or read book Contribution l tude du comportement en courbe des v hicules ferroviaires caisses inclinables circulant grandes vitesses written by Jean-Claude Clavier and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book tude de l usure et de l endommagement du roulement ferroviaire avec des mod les d essieux non rigides written by BRAHIM.. SOUA and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude ferroviaire présentée dans ce mémoire traite de trois types de dégradations de profils des roues et des rails en service. Comme tous les solides devant assurer une liaison par contact, les roues et les rails ferroviaires sont affectés par des dégradations telles que l'usure et la fatigue. Dans un premier temps, on s'intéresse à l'usure régulière des profils des roues et des rails. Ce type d'usure influence en particulier la stabilité des véhicules, donc le confort et la sécurité. Nous exposons notre modèle de simulation numérique de l'usure transverse des profils ; sa validation étant assurée par des applications à des profils mesures sur le réseau S.N.C.F. nous abordons ensuite le phénomène d'usure irrégulière longitudinale des roues à grande vitesse. Nous traitons cette partie avec de nouvelles hypothèses sur un mécanisme d'apparition d'ondulations. L'origine de ce phénomène est due au couplage, à travers le contact, de la dynamique transversale des bogies et de la torsion de l'axe des essieux. En nous appuyant sur deux modèles de simulations numériques, nous montrons la validité des hypothèses et nous mettons en évidence le mécanisme d'usure irrégulière longitudinale des roues. La dernière partie est consacrée a la fatigue des rails soumis au contact roulant, on y étudie une forme particulière appelée le Head chocking. Une première phase, basée sur l'étude des efforts de contact dus au comportement en courbes de certains véhicules ferroviaires, nous permet d'isoler les caractéristiques du système véhicule-voie les plus contraignantes. Une seconde étape consiste à étudier les conditions d'amorçage des fissures par deux approches : le critère de Dang van et la mécanique de l'endommagement. Les résultats obtenus nous permettent de proposer des dispositions qui semblent appropriées à la lutte contre le Head chocking

Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.

Download or read book Comportement en courbe des v hicules ferroviaires written by Jacques BEVAND and published by . This book was released on 1985 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Etude du concept de suspensions actives written by Julien Vincent and published by . This book was released on 1999 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans des contextes conjoints de mutations du monde ferroviaire, et d'expansion de l'asservissement et du contrôle actif, cette thèse de doctorat de mécanique propose une réflexion sur le concept de suspensions actives et leurs applications aux voitures ferroviaires. Ces études, menées en collaboration entre le Département de Mécanique des Solides de l'Ecole Centrale de Lyon et la Direction de la Recherche et de la Technologie de la SNCF, ont permis de développer diverses approches du problème : approches théoriques par recherche de lois de contrôle, approches numériques par simulations des effets de suspensions actives sur des modèles réalistes de véhicules ferroviaires et quantification du confort, approches techniques par la définition de spécifications de choix de technologiques et approches expérimentales par la conduite de phases d'essais et la connaissance du comportement dynamique du véhicule. Les apports majeurs de ce travail résident en des synthèses de lois de contrôle (lois optimales et lois optimales non linéaires), la génération de nouveaux concepts comme le contrôle global (contrôle simultané des mouvements transversaux et mouvements verticaux de la voiture), et le contrôle multilois (contrôle adaptatif utilisant une combinaison linéaire de lois optimales, la combinaison linéaire étant assurée au moyen de pondérations issues d'un calcul de logique floue). La connaissance du système ferroviaire et la volonté de construire des modèles réalistes ont permis l'établissement de simulations indiquant des gains potentiels de confort notoires. Le choix de nouvelles technologies - actionneur électromécanique - est lui aussi innovant dans cette gamme de puissance destinée au contrôle de mouvement de grosses structures mobiles. Les essais à venir devraient être riches en enseignements et leur diffusion intéressera certainement la communauté des chercheurs. En attendant, ce mémoire, conçu dans un esprit didactique, se limite à une synthèse actualisée.

Download or read book Contribution l tude de la dynamique transversale d un v hicule ferroviaire written by Edgard Furet and published by . This book was released on 1966 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Concrete Railway sleepers written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1987-01-01 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of concrete sleepers in railways started in the 1940s. They are currently used in many countries thoughout the world at a rate of over 12 million per year. This report discusses the various types of sleeper which have been developed - monoblock, two-block, reinforced and prestressed concrete. Separate sections deal with design, rail fastening systems, manufacture, quality control and testing, installation and performance, and research and development.

Download or read book Railway Engineering written by Vassilios A. Profillidis and published by Ashgate Publishing. This book was released on 2000 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering issues ranging from rail's position in the transport market to track design and train dynamics, this updated and revised edition provides a concise and useful synopsis of current railway technology and scientific analysis.

Download or read book Fatigue in Railway Infrastructure written by Mark Robinson and published by Elsevier. This book was released on 2009-08-20 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue is a major issue affecting safety and quality of service in the railway industry. This book reviews key aspects of this important subject. It begins by providing an overview of the subject, discussing fatigue at the wheel-rail interface and in other aspects of infrastructure. It then considers fatigue in railway and tramway track, looking at causes of potential failure in such areas as rails and fixings as well as sleepers. It also reviews failure points in structures such as embankments and cuttings. The book analyses fatigue in railway bridges, looking in particular at masonry arch bridges as well as metal and concrete bridges. Two final chapters review safety and reliability issues affecting escalators and lifts.Fatigue in railway infrastructure is a helpful reference for those in the railway industry responsible for infrastructure maintenance as well as those researching this important subject. - Provides a concise review of fatigue in the railway infrastructure - Examines the causes of potential failure in rails, fixings and sleepers - Analyses fatigue in railway bridges including masonry arch, metal and concrete structures

Download or read book Construction Dictionary written by Nawic Education Foundation and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive listing of the terms and phrases used in construction. Included are many that are encountered daily on the jobsite or in the construction office.