MODELISATION STATIQUE ET DYNAMIQUE DES PALIERS FLUIDES PAR LA METHODE DES ELEMENTS FINIS ET COMPARAISON EXPERIMENTALE PDF Download

Author: YONG.. TIAN
Publisher:
ISBN:
Category :
Languages : fr
Pages : 166

View

Book Description
CE TRAVAIL A PERMIS D'APPORTER UNE CONTRIBUTION THEORIQUE DANS LA MODELISATION NUMERIQUE DES PROBLEMES DE PALIERS FLUIDES, ET EXPERIMENTALE DANS L'ETUDE DU COMPORTEMENT DYNAMIQUE DES PALIERS HYDRODYNAMIQUES. LES ANALYSES LINEAIRES ET NON LINEAIRES ET LES PROGRAMMES DE CALCUL PAR ELEMENTS FINIS PERMETTENT DE DETERMINER LES COMPORTEMENTS STATIQUES ET DYNAMIQUE DE PALIERS EN REGIME HYDROSTATIQUE OU HYBRIDE (HYDROSTATIQUE-HYDRODYNAMIQUE), AVEC ECOULEMENT LAMINAIRE OU TURBULENT. PAR AILLEURS, DES FORMULES ANALYTIQUES DE CALCUL DES COEFFICIENTS DYNAMIQUES POUR LES PALIERS HYBRIDES EXCENTRES EN REGIME LAMINAIRE SONT PROPOSEES. LE TRAVAIL EST COMPLETE PAR L'ETUDE STATIQUE DES PALIERS A AIR. UNE VALIDATION EXPERIMENTALE SUR UN BANC DE BROCHE HYDRODYNAMIQUE A ETE REALISEE. LES RESULTATS ENTRE L'EXPERIENCE ET LA THEORIE PRESENTENT UNE BONNE CONCORDANCE QUALITATIVE, QUI SUGGERE D'AMELIORER LA PRECISION DU BANC D'ESSAI

Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Structures and Materials Panel. Meeting
Publisher:
ISBN: 9789283600374
Category : Airplanes
Languages : en
Pages : 190

View

Book Description

Author: Jean Salençon
Publisher: John Wiley & Sons
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 184

View

Book Description

Author: Jean Salencon
Publisher: Springer Science & Business Media
ISBN: 3642565425
Category : Science
Languages : en
Pages : 794

View

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: Jean Salençon
Publisher: Wiley-ISTE
ISBN: 9781848215405
Category : Technology & Engineering
Languages : en
Pages : 0

View

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: Berker Bilgin
Publisher: CRC Press
ISBN: 1351396714
Category : House & Home
Languages : en
Pages : 975

View

Book Description
Electric motors are the largest consumer of electric energy and they play a critical role in the growing market for electrification. Due to their simple construction, switched reluctance motors (SRMs) are exceptionally attractive for the industry to respond to the increasing demand for high-efficiency, high-performance, and low-cost electric motors with a more secure supply chain. Switched Reluctance Motor Drives: Fundamentals to Applications is a comprehensive textbook covering the major aspects of switched reluctance motor drives. It provides an overview of the use of electric motors in the industrial, residential, commercial, and transportation sectors. It explains the theory behind the operation of switched reluctance motors and provides models to analyze them. The book extensively concentrates on the fundamentals and applications of SRM design and covers various design details, such as materials, mechanical construction, and controls. Acoustic noise and vibration is the most well-known issue in switched reluctance motors, but this can be reduced significantly through a multidisciplinary approach. These methodologies are explained in two chapters of the book. The first covers the fundamentals of acoustic noise and vibration so readers have the necessary tools to analyze the problems and explains the surface waves, spring-mass models, forcing harmonics, and mode shapes that are utilized in modeling and analyzing acoustic noise and vibration. The second applies these fundamentals to switched reluctance motors and provides examples for determining the sources of any acoustic noise in switched reluctance motors. In the final chapter two SRM designs are presented and proposed as replacements for permanent magnet machines in a residential HVAC application and a hybrid-electric propulsion application. It also shows a high-power and compact converter design for SRM drives. Features: Comprehensive coverage of switched reluctance motor drives from fundamental principles to design, operation, and applications A specific chapter on electric motor usage in industrial, residential, commercial, and transportation applications to address the benefits of switched reluctance machines Two chapters address acoustic noise and vibration in detail Numerous illustrations and practical examples on the design, modeling, and analysis of switched reluctance motor drives Examples of switched reluctance motor and drive design

Author: International Atomic Energy Agency
Publisher: International Atomic Energy Agency
ISBN: 9789201063205
Category : Technology & Engineering
Languages : en
Pages : 72

View

Book Description
This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.

Author:
Publisher:
ISBN:
Category :
Languages : fr
Pages : 139

View

Book Description

Author: Simon Gaisford
Publisher: Royal Society of Chemistry
ISBN: 1788018133
Category : Science
Languages : en
Pages : 280

View

Book Description
The use of thermal and calorimetric methods has shown rapid growth over the past few decades, in an increasingly wide range of applications. The original text was published in 2001; since then there have been significant advances in various analytical techniques and their applications. This second edition supplies an up to date, concise and readable account of the principles, experimental apparatus and practical procedures used in thermal analysis and calorimetric methods of analysis. Written by experts in their field, brief accounts of the basic theory are reinforced with detailed technical advances and contemporary developments. Where appropriate, applications are used to highlight particular operating principles or methods of interpretation. As an important source of information for many levels of readership in a variety of areas, this book will be an aid for students and lecturers through to industrial and laboratory staff and consultants.

Author: Vincent C. H. Tong
Publisher: Cambridge University Press
ISBN: 1107041724
Category : Science
Languages : en
Pages : 467

View

Book Description
Taking a transdisciplinary approach to seismology, this unique book reviews the most recent developments in planetary seismology, helioseismology, and asteroseismology.