Download or read book Dynamique ferroviaire et contact roue rail Principes de guidage comportement dynamique et modes d endommagement written by Kuka and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamique ferroviaire et contact roue rail Simulations et essais pour l valuation du comportement dynamique de marche written by Kuka and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mod lisation num rique du contact roue rail pour l tude des param tres influen ant les coefficients de Kalker written by Moncef Toumi and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le calcul des efforts normaux et tangents est important pour la modélisation dynamique du système véhicule-voie en ferroviaire. Pour déterminer les forces tangentielles au contact roue-rail, les coefficients de Kalker sont utilisés dans la plupart des codes de dynamique ferroviaire, pour les différents modèles de contact. Ces coefficients ont été mesurés sur banc à plusieurs reprises dans les années 80. Une synthèse de ces travaux, réalisée par Hobbs, montre que certaines de ces mesures présentent une baisse pouvant atteindre 50% par rapport à la théorie de Kalker. L'objet de cette thèse est d'identifier d'abord les véritables causes de la dispersion constatée entre les différentes mesures, généralement attribuée à la contamination de la surface, puis de développer un modèle numérique capable d'en tenir compte.La démarche numérique proposée est sur deux volets. Dans le premier volet, une méthode itérative directe par éléments de frontière basée sur les intégrales de surface de Boussinesq-Cerruti est réécrite pour l'étude du contact normal et glissant entre deux corps élastiques, puis étendue pour la résolution du problème de contact roulant. Appliquée avec succès au contact roue-rail non-Hertzien, cette méthode est un outil prometteur pour l'étude des paramètres influençant les coefficients de Kalker qui allie à la fois la précision et la rapidité.Dans le deuxième volet, le problème du contact roue-rail élastique est résolu à l'aide de la méthode des éléments finis en utilisant les schémas d'intégration temporelle explicite et implicite. La solution élastique est comparée avec le logiciel de référence CONTACT. Le modèle par éléments finis 3D développé a permis de prendre en compte d'une part le comportement élasto-plastique des corps en contact et d'autre part l'existence d'une couche de troisième corps sur l'interface du contact roue-rail. Ainsi, en fin de cette étude, une correction aux coefficients de Kalker est estimée à partir d'un modèle qui prend mieux en compte la réalité physique du contact roue-rail.Afin d'évaluer l'influence de cette correction sur la vitesse critique du véhicule ferroviaire, une étude de stabilité est réalisée avec le code de dynamique ferroviaire VOCO dans lequel des facteurs de réduction des coefficients de Kalker ont été appliqués.
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 Culture urban future written by UNESCO and published by UNESCO Publishing. This book was released on 2016-12-31 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report presents a series of analyses and recommendations for fostering the role of culture for sustainable development. Drawing on a global survey implemented with nine regional partners and insights from scholars, NGOs and urban thinkers, the report offers a global overview of urban heritage safeguarding, conservation and management, as well as the promotion of cultural and creative industries, highlighting their role as resources for sustainable urban development. Report is intended as a policy framework document to support governments in the implementation of the 2030 Agenda for Sustainable Urban Development and the New Urban Agenda.
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 Scientific Canadian Mechanics Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cambridge Yearbook of European Legal Studies Vol 13 2010 2011 written by Catherine Barnard and published by Bloomsbury Publishing. This book was released on 2011-12-15 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cambridge Yearbook of European Legal Studies provides a forum for the scrutiny of significant issues in EU Law, the law of the European Convention on Human Rights, and Comparative Law with a 'European' dimension, and particularly those issues which have come to the fore during the year preceding publication. The contributions appearing in the collection are commissioned by the Centre for European Legal Studies (CELS) Cambridge, a research centre in the Law Faculty of the University of Cambridge specialising in European legal issues. The papers presented are at the cutting edge of the fields which they address, and reflect the views of recognised experts drawn from the University world, legal practice, and the institutions of both the EU and its Member States. Inclusion of the comparative dimension brings a fresh perspective to the study of European law, and highlights the effects of globalisation of the law more generally, and the resulting cross fertilisation of norms and ideas that has occurred among previously sovereign and separate legal orders. The Cambridge Yearbook of European Legal Studies is an invaluable resource for those wishing to keep pace with legal developments in the fast moving world of European integration. INDIVIDUAL CHAPTERS Please click on the link below to purchase individual chapters from Volume 13 through Ingenta Connect: www.ingentaconnect.com SUBSCRIPTION TO SERIES To place an annual online subscription or a print standing order through Hart Publishing please click on the link below. Please note that any customers who have a standing order for the printed volumes will now be entitled to free online access. www.hartjournals.co.uk/cyels/subs Editorial Advisory Board: Albertina Albors-Llorens, John Bell, Alan Dashwood, Simon Deakin, David Feldman, Richard Fentiman, Angus Johnston, John Spencer Founding Editors: Alan Dashwood and Angela Ward Ius Commune Prize 2012 Alexandre Saydé wrote Chapter 15 in this volume entitled: 'One Law, Two Competitions: An Enquiry into the Contradictions of Free Movement Law' and we are delighted to announce that he has been awarded the Ius Commune Prize 2012.
Download or read book A Midsummer s Nightmare written by Garry Kilworth and published by Gateway. This book was released on 2011-09-29 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sherwood Forest, home of Oberon, Titania, Puck, Cobweb, Peaseblossom and the rest of the mob, has been whittled away by urban development. It's time to move on, the fairies decide. Sid, their captive, a kindly if gruff young car mechanic, teaches Titania to drive, and on Midsummer's Eve the party sets off in a battered and smelly old bus. They're bound for the New Forest, where they hope to be able to regenerate their magic. The fairies' journey is full of excitement. At a village fair, they show the morris dancers how to cut previously undreamt-of capers. Titania falls in love with a human baby and steals her from her pram, starting a nationwide search for the missing infant. The fairies then link up with a group of New Age travellers on their way to Stonehenge, who befriend them almost without question. Finally, a fight to the death between Titania and the terrifying and sadistic Morgan-le-Fey must take place before everyone can settle down into some form of harmony and peace.
Download or read book The Man With the Golden Torc written by Simon R. Green and published by Penguin. This book was released on 2007-06-05 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: New York Times bestselling author Simon Green introduces a new kind of hero, one who fights the good fight against some very old foes in the first novel in the Secret Histories series. The name’s Bond. Shaman Bond. Actually, that's just his cover. His real name is Eddie Drood, but when your job includes a license to kick supernatural arse on a regular basis, you find your laughs where you can. For centuries, his family has been the secret guardian of Humanity, all that stands between all of you and all of the really nasty things that go bump in the night. As a Drood field agent he wore the golden torc, he killed monsters, and he protected the world. He loved his job. Right up to the point where his own family declared him rogue for no reason. Now, the only people who can help Eddie prove his innocence are the people he used to consider his enemies...
Download or read book The Dark Design written by Philip Jose Farmer and published by Tor Books. This book was released on 2010-06-08 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: A New York Times bestsesller, The Dark Design is the third novel in Hugo and Nebula award-winning science fiction legend Philip José Farmer's Riverworld series. Milton Firebrass, once Mark Twain's enemy and now his greatest ally, plans to build a giant airship that can fly to the North Pole of Riverworld. Once there, he hopes to learn the secret of the mysterious tower that dominates the landscape and find the answer to his most urgent question: could the tower contain the Ethicals, the enigmatic beings that created Riverworld? Meanwhile, Jill Gulbirra is challenged for the job of piloting the airship by none other than Cyrano de Bergerac. As if there were not enough challenges facing the crew, they soon suspect there is an agent of the Ethicals among their number, plotting their destruction.... At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.
Download or read book Sweet Silver Blues written by Glen Cook and published by Penguin. This book was released on 1990-05-01 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: It should have been a simple job. But for Garrett, a human detective in a world of gnomes, tracking down the woman to whom his dead pal Danny left a fortune in silver is no slight task. Even with the aid of Morley, the toughest half-elf around, Garrett isn't sure he'll make it out alive from a land where magic can be murder, the dead still talk, and vampires are always hungry for human blood.
Download or read book Socialism Perestroika and the Dilemmas of Soviet Economic Reform written by John E Tedstrom and published by Routledge. This book was released on 2021-12-13 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights that Soviet economic planners and politicians must come to recognize the need to make fundamental changes, not simply incremental refinements, in the failing Soviet system. It examines the dynamics of the process of perestroika and the complexity of individual economic issues.
Download or read book Shovel Ready written by Adam Sternbergh and published by Broadway Books. This book was released on 2014 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the dirty bomb hit Times Square and the city became a shell of itself, Spademan has become a hitman, not a garbage man. But when he's hired to kill the daughter of a powerful evangelist, his unadorned street life is upended.
Download or read book The Ladybird Illustrated written by D H Lawrence and published by . This book was released on 2020-11-09 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Ladybird is a long tale or novella by D. H. Lawrence. It was first drafted in 1915 as a short story entitled The Thimble. Lawrence rewrote and extended it under a new title in December 1921 and sent the final version to his English agent on 9 January 1922. It was collected with two other tales, The Captain's Doll and The Fox, and the three novellas were then published in London by Martin Secker in March 1923 under the title The Ladybird and in New York by Thomas Seltzer as The Captain's Doll in April 1923."
Download or read book Notes on the Minor Prophets written by Henry Allan Ironside and published by . This book was released on 1955 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Outlaws written by Ernst Von Salomon and published by Arktos. This book was released on 2013 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is November 1918. Germany has just surrendered after four years of the most savage warfare in history. It is teetering on the brink of total social and economic collapse, and the German people now lie at the mercy of new, liberal politicians who despise everything Germany once stood for. The Communists are rioting in the streets, threatening to topple the new government in Weimar and bring about their own revolution. The frontline soldiers are returning from the hell of the war to find an unrecognizable land, the principles and traditions they had sacrificed so much to defend now the stuff of mockery. The narrator of The Outlaws, a 16-year-old military cadet, is too young to have served in the trenches, but feels the sting of this betrayal no less than they. Since Germany's armies have been all but disbanded, he joins the paramilitary Freikorps - groups of veterans who refuse to lay down their arms, and who have pledged to stop the Communists - and begins fighting, first in the streets of Germany's cities, and then in the Baltic states, defending Germany's eastern frontiers from Communist subversion while ignoring the calls to disengage by the meek politicians at home. After months of intense fighting abroad, the Freikorps soldiers return to settle scores with their enemies in Germany, dreaming of a nationalist counter-revolution, and, their trigger fingers still itchy, fix their sights on bringing down the hated new government once and for all... The Outlaws is a chronicle of the experiences of the men who fought in the Freikorps, but it is also an adventure and a war story about an entire generation of soldiers who loved their homeland more than peace and comfort, and who refused to accept defeat at any price. "What we wanted we did not know; but what we knew we did not want. To force a way through the prisoning wall of the world, to march over burning fields, to stamp over ruins and scattered ashes, to dash recklessly through wild forests, over blasted heaths, to push, conquer, eat our way through towards the East, to the white, hot, dark, cold land that stretched between ourselves and Asia - was that what we wanted? I do not know whether that was our desire, but that was what we did. And the search for reasons why was lost in the tumult of continuous fighting." - p. 65 Ernst von Salomon (1902-1972) was one of the writers of the German Conservative Revolution of the 1920s. Like the narrator of The Outlaws, he was a military cadet at the end of the First World War, and joined the Freikorps, participating in many of the events described in the book, including the assassination of Foreign Minister Walther Rathenau, for which he was imprisoned. He went on to write many books and film scripts.
