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Approche Experimentale Et Etude Theorique Des Mecanismes De Dissipation De Lenergie Vibratoire
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Book Synopsis Approche expérimentale et étude théorique des mécanismes de dissipation de l'énergie vibratoire by : Damiens Perret
Download or read book Approche expérimentale et étude théorique des mécanismes de dissipation de l'énergie vibratoire written by Damiens Perret and published by . This book was released on 2003 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les objectifs de ce travail de thèse sont, au niveau expérimental, d'élaborer et de caractériser les propriétés vibratoires de matériaux potentiellement intéressants pour la réalisation de résonateurs acoustiques à haut facteur de qualité. D'un point de vue théorique, le but est d'identifier et d'évaluer les mécanismes de dissipation de l'énergie vibratoire dans le domaine des fréquences proches du kHz qui nous intéresse. D'un point de vue expérimental, un dispositif de caractérisation vibratoire a été développé ; il repose sur la détection des modes propres de vibration et la détermination des facteurs de qualité des échantillons mesurés. Le procédé de sustentation sur film de gaz a permis d'élaborer des échantillons en verre de silice de différentes qualités. Nous avons montré que l'amortissement intrinsèque des silices synthétiques est environ un ordre de grandeur inférieur à celui des silices naturelles, dans le domaine des fréquences proches de 10 kHz. Une procédure de traitement de surface post-élaboration par attaque chimique a été développée, elle permet d'augmenter de façon importante les facteurs de qualité des échantillons en verre de silice. Les valeurs maximales atteintes pour le facteur de qualité sont de l'ordre de 107 pour les silices synthétiques. Afin de comprendre l'origine de ces différents niveaux d'amortissement observés, une série de caractérisations chimiques, optiques et acoustiques a été réalisée. Au niveau théorique, nous avons étudié les processus de dissipation rencontrés dans les matériaux, qui sont à l'origine de l'amortissement intrinsèque. Parmi les mécanismes identifiés dans la littérature, nous avons mis en évidence un important critère de sélection des matériaux résonnants : les pertes générées par thermoélasticité. En ce qui concerne les processus de dissipation ayant peu été étudiés dans la littérature, nous avons développé différents modèles théoriques. Les résultats de ces modèles montrent l'importance des contraintes internes dans l'amortissement intrinsèque. Par contre, la présence d'impuretés à l'état de traces ne semble pas avoir d'influence, au premier ordre, sur la valeur du facteur de qualité.Enfin, les propriétés vibratoires de deux autres familles de matériaux, identifiées comme potentiellement intéressantes, ont également été étudiées. Des échantillons en saphir monocristallin élaborés par la technique du préformage local, et des échantillons en verre métallique Pd-Ni-Cu-P obtenus par fusion en creuset froid et coulée en lingotière, présentent des facteurs de qualité inférieurs à ceux des échantillons en verre de silice.
Book Synopsis Dissipation de l'énergie en mécanique vibratoire by : Ahmad Al Majid
Download or read book Dissipation de l'énergie en mécanique vibratoire written by Ahmad Al Majid and published by . This book was released on 2002 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objectif de la recherche est d'avancer dans la connaissance des effets liés à la dissipation et d'établir des modèles afin de prévoir le comportement dynamique de systèmes dissipatifs. Le mémoire se compose de deux parties. Partie I. Opérateur hystérésis : Un modèle opérateur d'hystérésis original est présenté. Il peut notamment s'appliquer aux boucles force-déflexion de tout système mécanique. Tout d'abord est présentée une généralité sur les modélisations des amortissements visqueux et sec générés qui peuvent être internes ou externes à la structure. Les modèles d'hystérésis existants sont présentés. Par la suite est proposé le modèle opérateur d'hystérésis original avec son fondement mathématique et ses applications. Enfin la prévision des réponses harmoniques et transitoires d'une structure sur deux types de plots amortisseurs avec le modèle proposé. Partie IL Phénomènes métriques : Ici il est montré que de l'amortissement peut intervenir quand le mouvement déforme le système de coordonnées utilisées. Puis en utilisant le concept de la relativité restreinte est modélisé l'effet dissipatif induit par une excitation de fréquence variable. L'idée fondamentale est que chaque système a son propre temps qui dépend d'événements externes. Pour cela un axe supplémentaire représentant la fréquence d'excitation est pris en considération. Ensuite il s'agit d'évaluer l'amortissement dû à un phénomène transitoire en utilisant la géométrie des espaces de Riemann où la métrique ne dépend que des coordonnées de l'espace. La démarche s'appuie sur les concepts de la relativité générale. La solution au problème variationnel de la métrique donne les équations des géodésiques pour le système étudié. Les applications concernent la réponse forcée de 3 types de systèmes mécaniques. Elles permettent la validation expérimentale des modèles proposés.
Book Synopsis Quantum Mechanics, Volume 3 by : Claude Cohen-Tannoudji
Download or read book Quantum Mechanics, Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.
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 Dictionary of Building and Civil Engineering by : Don Montague
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.
Book Synopsis The Physics of Nuclear Reactors by : Serge Marguet
Download or read book The Physics of Nuclear Reactors written by Serge Marguet and published by Springer. This book was released on 2018-02-26 with total page 1462 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive volume offers readers a progressive and highly detailed introduction to the complex behavior of neutrons in general, and in the context of nuclear power generation. A compendium and handbook for nuclear engineers, a source of teaching material for academic lecturers as well as a graduate text for advanced students and other non-experts wishing to enter this field, it is based on the author’s teaching and research experience and his recognized expertise in nuclear safety. After recapping a number of points in nuclear physics, placing the theoretical notions in their historical context, the book successively reveals the latest quantitative theories concerning: • The slowing-down of neutrons in matter • The charged particles and electromagnetic rays • The calculation scheme, especially the simplification hypothesis • The concept of criticality based on chain reactions • The theory of homogeneous and heterogeneous reactors • The problem of self-shielding • The theory of the nuclear reflector, a subject largely ignored in literature • The computational methods in transport and diffusion theories Complemented by more than 400 bibliographical references, some of which are commented and annotated, and augmented by an appendix on the history of reactor physics at EDF (Electricité De France), this book is the most comprehensive and up-to-date introduction to and reference resource in neutronics and reactor theory.
Book Synopsis Acoustics, Aeroacoustics and Vibrations by : Fabien Anselmet
Download or read book Acoustics, Aeroacoustics and Vibrations written by Fabien Anselmet and published by John Wiley & Sons. This book was released on 2016-01-07 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: This didactic book presents the main elements of acoustics, aeroacoustics and vibrations. Illustrated with numerous concrete examples linked to solid and fluid continua, Acoustics, Aeroacoustics and Vibrations proposes a selection of applications encountered in the three fields, whether in room acoustics, transport, energy production systems or environmental problems. Theoretical approaches enable us to analyze the different processes in play. Typical results, mostly from numerical simulations, are used to illustrate the main phenomena (fluid acoustics, radiation, diffraction, vibroacoustics, etc.).
Book Synopsis Dynamique Non-linéaire Et Le Chaos by :
Download or read book Dynamique Non-linéaire Et Le Chaos written by and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Book Synopsis Dynamical Systems and Bifurcation Theory by : M. I. Camacho
Download or read book Dynamical Systems and Bifurcation Theory written by M. I. Camacho and published by . This book was released on 1987 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimentation and the Lyric in Contemporary French Poetry by : Jeff Barda
Download or read book Experimentation and the Lyric in Contemporary French Poetry written by Jeff Barda and published by Springer Nature. This book was released on 2019-10-17 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimentation and the Lyric in Contemporary French Poetry offers a new theoretical approach and historical perspective on the remarkable upsurge in creative poetic practices in France that have challenged traditional definitions of poetry and of the lyric. Focusing on the work of Pierre Alferi, Olivier Cadiot, Emmanuel Hocquard, Franck Leibovici, Anne Portugal and Denis Roche, this book provides an analysis of the most influential poets in French poetry of the last few decades. It contextualizes the theoretical models that inform their investigations, analyzing them alongside the history of the avant-garde and the heated theoretical debates that have taken place over whether to continue or bring an end to the lyric. Systematically addressing the various strategies employed by these poets and drawing on reception theory and cognitive studies, Jeff Barda argues that French radical poetics re-evaluates the lyric in cognitive terms beyond the personal. This book is essential reading for anyone interested in twenty-first-century forms of experimental writing and the connections between literature and the arts today.
Book Synopsis Cyclodextrins and Their Complexes by : Helena Dodziuk
Download or read book Cyclodextrins and Their Complexes written by Helena Dodziuk and published by John Wiley & Sons. This book was released on 2006-08-21 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering comprehensive and up-to-date know-how in one compact book, an experienced editor and top authors cover every aspect of these important molecules from molecular recognition to cyclodextrins as enzyme models. Chapters include reactivity and chemistry, chromatography, X-ray, NMR plus other physicochemical methods, as well as model calculations, rotaxane and catenane structures, and applications in the pharmaceutical industry. The book also discusses other applications such as in the cosmetics, toiletries, textile and wrapping industries, agrochemistry, electrochemical sensors, and devices. A must for everyone working with these substances.
Book Synopsis Mechanical Vibration by : William John Palm
Download or read book Mechanical Vibration written by William John Palm and published by . This book was released on 2007 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Model, analyze, and solve vibration problems, using modern computer tools. Featuring clear explanations, worked examples, applications, and modern computer tools, William Palm's Mechanical Vibration provides a firm foundation in vibratory systems. You'll learn how to apply knowledge of mathematics and science to model and analyze systems ranging from a single degree of freedom to complex systems with two and more degrees of freedom. Separate MATLAB sections at the end of most chapters show how to use the most recent features of this standard engineering tool, in the context of solving vibration problems. The text introduces Simulink where solutions may be difficult to program in MATLAB, such as modeling Coulomb friction effects and simulating systems that contain non-linearities. Ample problems throughout the text provide opportunities to practice identifying, formulating, and solving vibration problems. KEY FEATURES Strong pedagogical approach, including chapter objectives and summaries Extensive worked examples illustrating applications Numerous realistic homework problems Up-to-date MATLAB coverage The first vibration textbook to cover Simulink Self-contained introduction to MATLAB in Appendix A Special section dealing with active vibration control in sports equipment Special sections devoted to obtaining parameter values from experimental data
Book Synopsis Model Cellulosic Surfaces by : Maren Roman
Download or read book Model Cellulosic Surfaces written by Maren Roman and published by OUP USA. This book was released on 2010-04-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of the different methods of model cellulosic surface preparation and presents recent studies on the properties of these surfaces. The topics covered are considered relatively new and would serve as the launch pad for further research in this area.
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 Poly(lactic acid) Science and Technology by : Alfonso Jiménez
Download or read book Poly(lactic acid) Science and Technology written by Alfonso Jiménez and published by Royal Society of Chemistry. This book was released on 2015 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of the synthesis, characterisation, properties and applications of poly(lactic acid) science and technology covering scientific, ecological, social and economic issues.
Book Synopsis An Introduction To Plasmonics by : Olivier Pluchery
Download or read book An Introduction To Plasmonics written by Olivier Pluchery and published by World Scientific. This book was released on 2023-08-28 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is a plasmon? Is it a particle, like a photon or a wave? Plasmonics stands at the frontier of condensed matter physics, which is the world of electrons, optics and of photons. Plasmonics is one of the most active fields in nanophotonics. This book begins by exploring the concepts behind waves, and the electromagnetic description of light when it interacts with metals; it dedicates every chapter thereafter to all aspects of plasmonics. In particular, the surface plasmon polariton wave is explained in full detail, as well as the localized surface plasmon resonance of metallic nanoparticles. The active research area opened by plasmonics, as well as its applications, are also briefly explained, such as advanced biosensing, subwavelength waveguiding, quantum plasmonics, nanoparticle-based cancer therapies, optical nano-antenna and high-efficiency photovoltaic cells.The book is adapted for graduate students and places a special emphasis on providing complete explanations of the fundamental concepts of plasmonics. Further, each of these concepts is illustrated with examples drawn from the most recent scientific literature. Each chapter ends with a set of exercises that will help the reader revise the concepts and go deeper into the world of plasmonics. More than 70 exercises are included.
