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Contribution A La Modelisation Tridimensionnelle Des Phenomenes Transitoires Couples Magnetique Mecanique
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Book Synopsis CONTRIBUTION A LA MODELISATION TRIDIMENSIONNELLE DES PHENOMENES TRANSITOIRES COUPLES MAGNETIQUE MECANIQUE by : MATHIAS.. VOISIN
Download or read book CONTRIBUTION A LA MODELISATION TRIDIMENSIONNELLE DES PHENOMENES TRANSITOIRES COUPLES MAGNETIQUE MECANIQUE written by MATHIAS.. VOISIN and published by . This book was released on 2000 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS AVONS DEVELOPPE UN MODELE NUMERIQUE POUR LES PHENOMENES COUPLES MAGNETIQUE-MECANIQUE BIDIRECTIONNELS QUI APPARAISSENT DANS LES DISPOSITIFS ELECTROMAGNETIQUES. L'ALGORITHME DU SCHEMA DE COUPLAGE DEVELOPPE INTEGRE UNE BOUCLE DE CORRECTION DES HYPOTHESES, SIMILAIRE A CELLE DES SCHEMAS NON-LINEAIRES. LA BOUCLE EFFECTUE LA RESOLUTION DU PROBLEME MAGNETIQUE, LE CALCUL DES FORCES, LA RESOLUTION DU PROBLEME MECANIQUE ET PRENDS EN COMPTE LES DEFORMATIONS DANS L'ENSEMBLE DU PROBLEME COUPLE. LE PROBLEME MAGNETODYNAMIQUE EST ECRIT EN POTENTIELS COMBINES T-PHI DANS LE REPERE LAGRANGIEN. IL EST RESOLU PAR UNE METHODE COMBINEE ELEMENTS FINIS INTEGRALES DE FRONTIERES, AVEC DES ELEMENTS DE WHITNEY 3D. LE CALCUL PAS A PAS DANS LE TEMPS AVEC LA METHODE DES GRADIENTS CONJUGUES CONVERGE RAPIDEMENT. LES FORCES MAGNETIQUES SONT EVALUEES PAR LA METHODE DES TRAVAUX VIRTUELS. LES HYPOTHESES SONT AISEMENT VERIFIEES GRACE AU MODELE MAGNETIQUE. LA VARIATION DE LA COENERGIE EST CALCULEE PAR DERIVATION DE LA MATRICE JACOBIENNE. CECI REDUIT LES CALCULS ET AMELIORE LA PRECISION. LE CHAMP DE FORCE NODAL OBTENU DEPEND DU MAILLAGE UTILISE ET NE CORRESPOND A RIEN DE PHYSIQUE. EN REVANCHE, IL CORRESPOND AUX DONNEES DU PROBLEME MECANIQUE SUR LE MEME MAILLAGE. LE CALCUL D'ELASTICITE LINEAIRE DYNAMIQUE EST MENE EN EQUATIONS MODALES. LE SYSTEME EST ALORS DIAGONAL ET NE REQUIERT QU'UN SEUL CALCUL PREPARATOIRE. ON NEGLIGE LES MODES HAUTES FREQUENCES POUR REDUIRE LA TAILLE DU SYSTEME. LA DEFORMATION DU MAILLAGE, OBTENU PAR DEPLACEMENT DES NUDS, SUFFIT A REPRESENTER LA DEFORMATION DE LA STRUCTURE. LA FORMULATION LAGRANGIENNE DU PROBLEME MAGNETIQUE PREND EN COMPTE LES DEFORMATIONS GEOMETRIQUES ET LES MOUVEMENTS DE CONDUCTEURS. LES DERIVEES GLOBALES INTEGRENT LES MATRICES DU SYSTEME MAGNETIQUE. LA DEFORMATION CONDUIT A DES MAILLAGES IMPROPRES AU CALCUL. UNE METHODE DE REPARTITION DES DISTORSIONS Y REMEDIE. L'EXEMPLE UTILISE POUR LA VALIDATION EST UN EXEMPLE IDEAL POUR REVELER LA COMPLEXITE DES PHENOMENES. LES RESULTATS OBTENUS CONCORDENT AVEC LES RESULTATS NUMERIQUES ET EXPERIMENTAUX DES AUTRES CHERCHEURS. LE MODELE AMELIORE LA VITESSE ET LA STABILITE DES CALCULS, CONTRIBUANT AINSI A AUGMENTER LA PRECISION. IL PRESENTE D'AUTRES CAPACITES ANALYSEES QUALITATIVEMENT, A DEFAUT DE MESURES DISPONIBLES.
Book Synopsis CONTRIBUTION A LA MODELISATION, DES PHENOMENES ELECTRIQUES-MAGNETIQUES COUPLES ET DU MOUVEMENT, POUR LES SYSTEMES ELECTROMAGNETIQUES TRIDIMENSIONNELS by : NAJIB.. GASMI
Download or read book CONTRIBUTION A LA MODELISATION, DES PHENOMENES ELECTRIQUES-MAGNETIQUES COUPLES ET DU MOUVEMENT, POUR LES SYSTEMES ELECTROMAGNETIQUES TRIDIMENSIONNELS written by NAJIB.. GASMI and published by . This book was released on 1996 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE ETUDE CONCERNE LA MODELISATION TRIDIMENSIONNELLE DES PHENOMENES ELECTROMAGNETIQUES REGIS PAR LES EQUATIONS DE LA MAGNETOSTATIQUE. DANS UNE PREMIERE PARTIE DU TRAVAIL, NOUS AVONS MENE UNE ETUDE COMPARATIVE ENTRE DIFFERENTS TYPES D'ELEMENTS GEOMETRIQUES ET CECI POUR DIFFERENTES FORMULATIONS EN POTENTIELS. NOUS AVONS CONSTATE QUE LES ELEMENTS HEXAEDRIQUES PERMETTAIENT UNE MEILLEURE APPROXIMATION AINSI QU'UN GAIN DE TEMPS DE CALCUL PAR RAPPORT AUX AUTRES TYPES D'ELEMENTS. ENSUITE, UN COUPLAGE DE CES FORMULATIONS AVEC LES EQUATIONS DE CIRCUITS ELECTRIQUES A ETE REALISE. NOTRE CODE DE CALCUL, QUI INTEGRE LES EQUATIONS DE CIRCUITS AINSI QUE DIFFERENTS TYPES D'ELEMENTS GEOMETRIQUES A ETE VALIDE SUR UNE APPLICATION INDUSTRIELLE. LA SECONDE PARTIE DE CE MEMOIRE A POUR BUT DE PROPOSER UNE METHODE CAPABLE DE TENIR COMPTE DU DEPLACEMENT D'UNE PARTIE MOBILE D'UN SYSTEME PAR RAPPORT A UNE PARTIE FIXE. NOUS PROPOSONS UNE TECHNIQUE POUR LAQUELLE LE MOUVEMENT N'EST PLUS CONSIDERE DANS UNE ZONE VOLUMIQUE (ENTREFER) MAIS SUR UNE SURFACE. EN EFFET, CETTE SURFACE NOUS SERT DE SUPPORT POUR RECOLLER DEUX MAILLAGES ISSUS DE SOUS DOMAINES DIFFERENTS. NOUS PROPOSONS SUR L'INTERFACE, UN ENSEMBLE DE FONCTIONS REPRESENTEES PAR DES MULTIPLICATEURS DE LAGRANGE ET QUI PERMETTENT DE RACCORDER CES DEUX DOMAINES. NOTRE MODELE A ETE VALIDE SUR UN EXEMPLE SIMPLE POUR LEQUEL ON CONSIDERE UN MOUVEMENT DE ROTATION.
Book Synopsis CONTRIBUTION A LA MODELISATION NUMERIQUE DE PHENOMENES COUPLES MAGNETIQUE-MECANIQUE. ETUDE DES VIBRATIONS D'ORIGINE ELECTROMAGNETIQUE D'UNE PLAQUE ELASTIQUE by : DAN.. MIRESCU
Download or read book CONTRIBUTION A LA MODELISATION NUMERIQUE DE PHENOMENES COUPLES MAGNETIQUE-MECANIQUE. ETUDE DES VIBRATIONS D'ORIGINE ELECTROMAGNETIQUE D'UNE PLAQUE ELASTIQUE written by DAN.. MIRESCU and published by . This book was released on 1996 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'ETUDE DES PHENOMENES COMPLEXES IMPOSE UNE ANALYSE DE L'ENSEMBLE DES INTERACTIONS ENTRE DIFFERENTS DOMAINES DE LA PHYSIQUE. LA MECANIQUE ET L'ELECTROMAGNETISME Y OCCUPENT UNE PLACE SPECIALE CAR LES COURANTS INDUITS DANS UN CORPS CONDUCTEUR DEPENDENT DE LA VITESSE DE MOUVEMENT ET LES FORCES QUI MODIFIERONT LE MOUVEMENT DEPENDENT DES COURANTS INDUITS. UNE ANALYSE DE CE TYPE DE PROBLEMES A ETE EFFECTUE DANS CETTE THESE POUR UNE PLAQUE ELASTIQUE, PLANE, RECTANGULAIRE ET CONDUCTRICE PLACEE DANS UN CHAMP MAGNETIQUE VARIABLE DANS LE TEMPS. DES ASPECTS SPECIFIQUES AUX PROBLEMES DE COUPLAGE ONT ETE REVELES AINSI QUE LEUR RESOLUTION ET LES RESULTATS DE MODELISATIONS ONT ETE COMPARES AVEC DES RESULTATS EXPERIMENTAUX ET CEUX DES AUTRES CHERCHEURS
Book Synopsis Contribution à la modélisation numérique des phénomènes couples magneto-élastiques by : Mondher Besbes
Download or read book Contribution à la modélisation numérique des phénomènes couples magneto-élastiques written by Mondher Besbes and published by . This book was released on 1995 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les travaux présentés dans ce mémoire traitent de la modélisation numérique dans l'hypothèse bidimensionnelle des phénomènes couples magneto-elastiques dans les dispositifs electromagnetiques. L'objectif est particulièrement cible a l'étude théorique et expérimentale des vibrations d'origine magnétique dans les machines a reluctance variable a double saillance. Dans le but de quantifier la réponse vibratoire d'une telle machine, nous avons introduit dans un code de calcul du champ magnétique, base sur la méthode des éléments finis, un module qui permet la détermination de la répartition des forces magnétiques locales pour calculer les déformations mécaniques résultantes. Le choix de la méthode de calcul de force magnétique, qui se base sur l'application locale du principe des travaux virtuels, a été justifie par la précision de cette méthode, sa generalite (milieux satures) et sa souplesse de mise en ouvre. L'analyse spectrale des forces magnétiques nous a permis de prédire quelles sont les modes de vibrations qui vont être excites. Le calcul du spectre des vibrations a été réalise en cherchant la solution de l'équation d'équilibre relative a chaque harmonique de force. Une analyse modale a été aussi effectuée pour déterminer les fréquences de résonance et les modes de vibrations associées. Parallèlement a cette approche numérique, nous avons analyse expérimentalement, en se basant sur des mesures accelerometriques, le comportement vibratoire de la machine. Grâce a cette analyse, nous avons pu valider le code de calcul des vibrations ainsi développe. L'ensemble de ces travaux a montre que la source principale du bruit acoustique, ou des vibrations qui le produisent, dans la machine d'étude réside sur l'action des forces magnétiques radiales d'attraction des dents statoriques et rotoriques en particulier lorsque celles-ci sont en conjonction. A la fin de ce mémoire, nous avons mis au point un modèle de couplage fort qui permet la résolution simultanée des problèmes couples magneto-elastiques. Ce type de modèle trouve son importance dans le cas ou les propriétés magnétiques et élastiques sont en forte interaction. Nous avons spécialement évoque dans cette partie le calcul des déformations des matériaux fortement magnétostrictifs et la résolution des problèmes de grandes déformations élastiques
Book Synopsis Contribution à la modélisation numérique des phénomènes électromagnétiques by : Dazhong Shen
Download or read book Contribution à la modélisation numérique des phénomènes électromagnétiques written by Dazhong Shen and published by . This book was released on 1987 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: EXPOSE D'UNE METHODE GENERALE QUI PERMET DE RESOUDRE DES PROBLEMES COUPLES DE CHAMP MAGNETIQUE ET DE CIRCUIT ELECTRIQUE, PERMETTANT DE PREDIRE LES PERFORMANCES DES MACHINES ELECTRIQUES AU STADE DE LA CONCEPTION. QUATRE MODELES ANISOTROPES QUI RECOUVRENT DE NOMBREUX MATERIAUX MAGNETIQUES EN ELECTROTECHNIQUE INTEGRES DANS LA METHODE DES ELEMENTS FINIS. ETUDE DU CIRCUIT MAGNETIQUE DE TRANSFORMATEURS EN 2D ET EN 3D
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Handbook of Electric Machines by : S. A. Nasar
Download or read book Handbook of Electric Machines written by S. A. Nasar and published by McGraw-Hill Companies. This book was released on 1987 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Induction Machines Handbook by : Ion Boldea
Download or read book Induction Machines Handbook written by Ion Boldea and published by CRC Press. This book was released on 2020-11-19 with total page 903 pages. Available in PDF, EPUB and Kindle. Book excerpt: The third edition of Induction Machines Handbook comprises two volumes, Induction Machines Handbook: Steady State Modeling and Performance and Induction Machines Handbook: Transients, Control Principles, Design and Testing. The promise of renewable (hydro and wind) energy via cage-rotor and doubly fed variable speed generators e-transport propulsion, i-home appliances makes this third edition state of the art tool, conceived with numerous case studies, timely for both Academia and Industry. The first volume offers a thorough treatment of steady state modeling and performance of induction machines, the most used electric motors (generators) in rather constant or variable speed drives for even lower energy consumption and higher productivity in basically all industries, from home appliances, through robotics to e-transport and wind energy conversion. The second volume presents a practical up to date treatment of intricate issues with induction machine (IM) required for design and testing both in rather constant and variable speed (with power electronics) drives. It contains ready to use in industrial design and testing knowledge with numerous case studies to facilitate thorough assimilation of new knowledge.
Book Synopsis Fault Diagnosis of Induction Motors by : Jawad Faiz
Download or read book Fault Diagnosis of Induction Motors written by Jawad Faiz and published by IET. This book was released on 2017-08-29 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive, structural approach to fault diagnosis strategy. The different fault types, signal processing techniques, and loss characterisation are addressed in the book. This is essential reading for work with induction motors for transportation and energy.
Download or read book El Niño written by Bruno Voituriez and published by UNESCO. This book was released on 2000 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: El Nino, caprice of the heavens, scapegoat for every calamity? The general public cannot really understand what is behind the El Nino phenomenon. The book offers a tour of the Earth's climate to understand one of its normal but extreme components.
Book Synopsis Advances in Hydroinformatics by : Philippe Gourbesville
Download or read book Advances in Hydroinformatics written by Philippe Gourbesville and published by Springer. This book was released on 2015-08-21 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of extended papers based on presentations given during the SIMHYDRO 2014 conference, held in Sophia Antipolis in June 2014. It focuses on the modeling and simulation of fast hydraulic transients, on 3D modeling, and on uncertainties and multiphase flows. The book explores both the limitations and performance of current models and presents the latest developments based on new numerical schemes, high-performance computing, multiphysics and multiscale methods, and better interaction with field or scale model data. It addresses the interests of practitioners, stakeholders, researchers and engineers active in this field.
Book Synopsis Molecular System Bioenergetics by : Valdur Saks
Download or read book Molecular System Bioenergetics written by Valdur Saks and published by John Wiley & Sons. This book was released on 2008-01-08 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this first integrated view, practically each of the world's leading experts has contributed to this one and only authoritative resource on the topic. Bringing systems biology to cellular energetics, they address in detail such novel concepts as metabolite channeling and medical aspects of metabolic syndrome and cancer.
Download or read book Buyology written by Martin Lindstrom and published by Currency. This book was released on 2010-02-02 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: NEW YORK TIMES BESTSELLER • “A fascinating look at how consumers perceive logos, ads, commercials, brands, and products.”—Time How much do we know about why we buy? What truly influences our decisions in today’s message-cluttered world? In Buyology, Martin Lindstrom presents the astonishing findings from his groundbreaking three-year, seven-million-dollar neuromarketing study—a cutting-edge experiment that peered inside the brains of 2,000 volunteers from all around the world as they encountered various ads, logos, commercials, brands, and products. His startling results shatter much of what we have long believed about what captures our interest—and drives us to buy. Among the questions he explores: • Does sex actually sell? • Does subliminal advertising still surround us? • Can “cool” brands trigger our mating instincts? • Can our other senses—smell, touch, and sound—be aroused when we see a product? Buyology is a fascinating and shocking journey into the mind of today's consumer that will captivate anyone who's been seduced—or turned off—by marketers' relentless attempts to win our loyalty, our money, and our minds.
Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Book Synopsis Submarine Mass Movements and Their Consequences by : Vasilios Lykousis
Download or read book Submarine Mass Movements and Their Consequences written by Vasilios Lykousis and published by Springer Science & Business Media. This book was released on 2007-09-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from leading researchers in science and engineering, this book provides a global perspective on submarine mass movements and their consequences. Authors report on new findings from fundamental as well as site-specific studies from around the world. All studies relied on the most recent technologies, including multi-beam sonar imaging techniques, 3D seismic analysis, slope stability analysis, debris flow, and tsunami modeling.
Download or read book Xenakis written by James Harley and published by Routledge. This book was released on 2004-08-02 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Xenakis: His Life in Music is a full-length study of the influential contemporary composer Iannis Xenakis. Following the trajectory of Xenakis’s compositional development, James Harley, who studied with Xenakis, presents the works together with clear explanations of the technical and conceptual innovations that shaped them. Harley examines the relationship between the composer and two early influences: Messiaen and Le Corbusier. Particular attention is paid to analyzing works which were vital to the composer’s creative development, from early, unpublished works to the breakthrough pieces Metastasis and Pithoprakta, through the oft-discussed decade of formalization and the evolving styles of the succeeding three decades.
Book Synopsis Nonlinear Structural Dynamics and Damping by : Juan Carlos Jauregui
Download or read book Nonlinear Structural Dynamics and Damping written by Juan Carlos Jauregui and published by Springer. This book was released on 2019-03-14 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book compiles recent research in the field of nonlinear dynamics, vibrations and damping applied to engineering structures. It addresses the modeling of nonlinear vibrations in beams, frames and complex mechanical systems, as well as the modeling of damping systems and viscoelastic materials applied to structural dynamics. The book includes several chapters related to solution techniques and signal analysis techniques. Last but not least, it deals with the identification of nonlinear responses applied to condition monitoring systems.
