Eléments coques magnétiques pour la modélisation de milieux de faible épaisseur PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Eléments coques magnétiques pour la modélisation de milieux de faible épaisseur PDF full book. Access full book title Eléments coques magnétiques pour la modélisation de milieux de faible épaisseur by Mohamed Hadjali. Download full books in PDF and EPUB format.
Book Description
Dans les dispositifs électrotechniques, il existe des structures ou des régions minces. Ces régions sont difficiles à modéliser avec les éléments finis conventionnels, principalement appropriés aux régions massives. La modélisation par la méthode des éléments finis de ces régions nécessite en première approche un maillage très fin. Ceci implique un temps de résolution assez important d'une part et d'autre part conduit à un système algébrique mal conditionné. Pour surmonter les problèmes liés à la modélisation des régions minces, plusieurs approches ont été proposées dans la littérature. Parmi elles, il y a la méthode utilisant les éléments coques qui permet de s'affranchir du maillage fin des régions de faible épaisseur. L'étude présentée dans ce mémoire concerne l'élaboration d'un code de calcul éléments finis adapté à la modélisation des régions minces. L'objectif consiste à mettre au point les formulations qui permettent d'analyser et de calculer de façon précise les champs, les pertes par courants de Foucault, ainsi que les forces magnétiques dans les cas magnétostatique et magnétodynamique.
Book Description
Dans les dispositifs électrotechniques, il existe des structures ou des régions minces. Ces régions sont difficiles à modéliser avec les éléments finis conventionnels, principalement appropriés aux régions massives. La modélisation par la méthode des éléments finis de ces régions nécessite en première approche un maillage très fin. Ceci implique un temps de résolution assez important d'une part et d'autre part conduit à un système algébrique mal conditionné. Pour surmonter les problèmes liés à la modélisation des régions minces, plusieurs approches ont été proposées dans la littérature. Parmi elles, il y a la méthode utilisant les éléments coques qui permet de s'affranchir du maillage fin des régions de faible épaisseur. L'étude présentée dans ce mémoire concerne l'élaboration d'un code de calcul éléments finis adapté à la modélisation des régions minces. L'objectif consiste à mettre au point les formulations qui permettent d'analyser et de calculer de façon précise les champs, les pertes par courants de Foucault, ainsi que les forces magnétiques dans les cas magnétostatique et magnétodynamique.
Author: Jean Salencon Publisher: Springer Science & Business Media ISBN: 3642565425 Category : Science Languages : en Pages : 794
Book Description
Outstanding approach to continuum mechanics. Its high mathematical level of teaching together with abstracts, summaries, boxes of essential formulae and numerous exercises with solutions, makes this handbook one of most complete books in the area. Students, lecturers, and practitioners will find this handbook a rich source for their studies or daily work.
Author: Theodore Theodorsen Publisher: ISBN: Category : Aerodynamics Languages : en Pages : 184
Book Description
Summary: A technical method is given for calculating the axial interference velocity of a propeller. The method involves the use of certain weight functions P, Q, and F. Numerical values for the weight functions are given for two-blade, three-blade, and six-blade propellers.
Author: Jean Salençon Publisher: Wiley-ISTE ISBN: 9781848215405 Category : Technology & Engineering Languages : en Pages : 0
Book Description
Since the middle of the 20th Century yield design approaches have been identified with the lower and upper bound theorem of limit analysis theory – a theory associated with perfect plasticity. This theory is very restrictive regarding the applicability of yield design approaches, which have been used for centuries for the stability of civil engineering structures. This book presents a theory of yield design within the original “equilibrium/resistance” framework rather than referring to the theories of plasticity or limit analysis; expressing the compatibility between the equilibrium of the considered structure and the resistance of its constituent material through simple mathematical arguments of duality and convex analysis results in a general formulation, which encompasses the many aspects of its implementation to various stability analysis problems. After a historic outline and an introductory example, the general theory is developed for the three-dimensional continuum model in a versatile form based upon simple arguments from the mathematical theory of convexity. It is then straightforwardly transposed to the one-dimensional curvilinear continuum, for the yield design analysis of beams, and the two-dimensional continuum model of plates and thin slabs subjected to bending. Field and laboratory observations of the collapse of mechanical systems are presented along with the defining concept of the multi-parameter loading mode. The compatibility of equilibrium and resistance is first expressed in its primal form, on the basis of the equilibrium equations and the strength domain of the material defined by a convex strength criterion along with the dual approach in the field of potentially safe loads, as is the highlighting of the role implicitly played by the theory of yield design as the fundamental basis of the implementation of the ultimate limit state design (ULSD) philosophy with the explicit introduction of resistance parameters. Contents 1. Origins and Topicality of a Concept. 2. An Introductory Example of the Yield Design Approach. 3. The Continuum Mechanics Framework. 4. Primal Approach of the Theory of Yield Design. 5. Dual Approach of the Theory of Yield Design. 6. Kinematic Exterior Approach. 7. Ultimate Limit State Design from the Theory of Yield Design. 8. Optimality and Probability Approaches of Yield Design. 9. Yield Design of Structures. 10. Yield Design of Plates: the Model. 11. Yield Design of Plates Subjected to Pure Bending. About the Authors Jean Salençon is Emeritus Professor at École polytechnique and École des ponts et chaussées, ParisTech, France. Since 2009 he has been a member of the Administrative Board of CNRS (Paris, France). He has received many awards including the Légion d’Honneur (Commander), Ordre National du Mérite (Officer) and Palmes Académiques (Commander). His research interests include structure analysis, soil mechanics and continuum mechanics.
Author: International Livestock Research Institute Publisher: ILRI (aka ILCA and ILRAD) ISBN: 9789291460038 Category : Animal industry Languages : en Pages : 268
Book Description
Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium Publisher: ISBN: Category : Helicopters Languages : en Pages : 402
Author: North Atlantic Treaty Organization Publisher: CreateSpace ISBN: 9781482679441 Category : Reference Languages : en Pages : 450
Book Description
NATO Glossary of terms and definitions (English and French). Listing terms of military significance and their definitions for use in NATO.
Author: Mohamed Hadjali
Author: Mohamed Hadjali
Author: Jean Salençon
Author: Jean Salencon
Author: Stuart Hill
Author: Theodore Theodorsen
Author: Jean Salençon
Author: International Livestock Research Institute
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium
Author: 
Author: North Atlantic Treaty Organization