Electron Energy Loss Spectroscopy and Surface Vibrations
Electron Energy Loss Spectroscopy and Surface Vibrations

Author: H. Ibach

Publisher: Academic Press

Published: 2013-10-22

Total Pages: 379

ISBN-13: 1483259455

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Electron Energy Loss Spectroscopy and Surface Vibrations is devoted to electron energy loss spectroscopy as a probe of the crystal surface. Electrons with energy in the range of a few electron volts sample only a few atomic layers. As they approach or exit from the crystal, they interact with the vibrational modes of the crystal surface, or possibly with other elementary excitations localized there. The energy spectrum of electrons back-reflected from the surface is thus a rich source of information on its dynamics. The book opens with a detailed analysis of the physics that controls the operation of the monochromator, which is the core of the experimental apparatus. Separate chapters follow on the interaction of electrons with vibrational modes of the surface region and with other elementary excitations in the vicinity; the lattice dynamics of clean and adsorbate-covered surfaces, with emphasis on those features of particular relevance to surface vibrational spectroscopy; and selected applications vibration spectroscopy in surface physics and chemistry.

Vibrations At Surfaces 1985
Vibrations At Surfaces 1985

Author: N.V. Richardson

Publisher: Elsevier

Published: 2009-06-05

Total Pages: 714

ISBN-13: 008096060X

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This volume contains almost all of the 79 papers presented at the Fourth International Conference on Vibrations at Surfaces. The proceedings reflect the significant advances that have been made in the field of surface vibrations since the previous conference on the topic held in 1982. The presented papers showed a tendency of development in new directions, particularly in relation to dynamical effects occurring in atom and molecule-surface interactions. These proceedings cover the field of surface vibrational spectroscopy in such a way as to make the book an asset to those involved in both experimental and theoretical work in this field.

Vibrations of mechanical systems with regular structure
Vibrations of mechanical systems with regular structure

Author: Ludmilla Banakh

Publisher: Springer Science & Business Media

Published: 2010-08-05

Total Pages: 249

ISBN-13: 3642031269

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In this book, regular structures are de ned as periodic structures consisting of repeated elements (translational symmetry) as well as structures with a geom- ric symmetry. Regular structures have for a long time been attracting the attention of scientists by the extraordinary beauty of their forms. They have been studied in many areas of science: chemistry, physics, biology, etc. Systems with geometric symmetry are used widely in many areas of engineering. The various kinds of bases under machines, cyclically repeated forms of stators, reduction gears, rotors with blades mounted on them, etc. represent regular structures. The study of real-life engineering structures faces considerable dif culties because they comprise a great number of working mechanisms that, in turn, consist of many different elastic subsystems and elements. The computational models of such systems represent a hierarchical structure and contain hundreds and thousands of parameters. The main problems in the analysis of such systems are the dim- sion reduction of model and revealing the dominant parameters that determine its dynamics and form its energy nucleus. The two most widely used approaches to the simulation of such systems are as follows: 1. Methods using lumped parameters models, i.e., a discretization of the original system and its representation as a system with lumped parameters [including nite-element method (FEM)]. 2. The use of idealized elements with distributed parameters and known analytical solutions for both the local elements and the subsystems.

12th International Conference on Vibrations in Rotating Machinery
12th International Conference on Vibrations in Rotating Machinery

Author: Institute of Mechanical Engineers

Publisher: CRC Press

Published: 2020-10-22

Total Pages: 733

ISBN-13: 1000318532

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Since 1976, the Vibrations in Rotating Machinery conferences have successfully brought industry and academia together to advance state-of-the-art research in dynamics of rotating machinery. 12th International Conference on Vibrations in Rotating Machinery contains contributions presented at the 12th edition of the conference, from industrial and academic experts from different countries. The book discusses the challenges in rotor-dynamics, rub, whirl, instability and more. The topics addressed include: - Active, smart vibration control - Rotor balancing, dynamics, and smart rotors - Bearings and seals - Noise vibration and harshness - Active and passive damping - Applications: wind turbines, steam turbines, gas turbines, compressors - Joints and couplings - Challenging performance boundaries of rotating machines - High power density machines - Electrical machines for aerospace - Management of extreme events - Active machines - Electric supercharging - Blades and bladed assemblies (forced response, flutter, mistuning) - Fault detection and condition monitoring - Rub, whirl and instability - Torsional vibration Providing the latest research and useful guidance, 12th International Conference on Vibrations in Rotating Machinery aims at those from industry or academia that are involved in transport, power, process, medical engineering, manufacturing or construction.

MECHANICAL VIBRATIONS AND NOISE ENGINEERING
MECHANICAL VIBRATIONS AND NOISE ENGINEERING

Author: AMBEKAR A.G.

Publisher: PHI Learning Pvt. Ltd.

Published: 2006-01-01

Total Pages: 412

ISBN-13: 8120329007

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This book, which is a result of the author's many years of teaching, exposes the readers to the fundamentals of mechanical vibrations and noise engineering. It provides them with the tools essential to tackle the problem of vibrations produced in machines and structures due to unbalanced forces and the noise produced thereof. The text lays emphasis on mechanical engineering applications of the subject and develops conceptual understanding with the help of many worked-out examples. What distinguishes the text is that three chapters are devoted to Sound Level and Subjective Response to Sound, Noise: Effects, Ratings and Regulations and Noise: Sources, Isolation and Control. Importance of mathematical formulation in converting a distributed parameter vibration problem into an equivalent lumped parameter problem is also emphasized. Primarily designed as a text for undergraduate and postgraduate students of mechanical engineering, this book would also be useful for undergraduate and postgraduate students of civil, aeronautical and automobile engineering as well as practising engineers.

Sound and Structural Vibration
Sound and Structural Vibration

Author: Frank J. Fahy

Publisher: Academic Press

Published: 1985

Total Pages: 338

ISBN-13: 9780122476716

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This textbook looks at the analysis of audio-frequency vibration in coupled solid-fluid systems in which the role of waves in both media is emphasised.

Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures
Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures

Author: Gian Paolo Cimellaro

Publisher: Springer Nature

Published: 2023-01-06

Total Pages: 1074

ISBN-13: 3031211871

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This volume gathers the proceedings of the 17th World Conference on Seismic Isolation (17WCSI), held in Turin, Italy on September 11-15, 2022. Endorsed by ASSISi Association (Anti-Seismic Systems International Society), the conference discussed state-of-the-art information as well as emerging concepts and innovative applications related to seismic isolation, energy dissipation and active vibration control of structures, resilience and sustainability. The volume covers highly diverse topics, including earthquake-resistant construction, protection from natural and man-made impacts, safety of structures, vulnerability, international standards on structures with seismic isolation, seismic isolation in existing structures and cultural heritage, seismic isolation in high rise buildings, seismic protection of non-structural elements, equipment and statues. The contributions, which are published after a rigorous international peer-review process, highlight numerous exciting ideas that will spur novel research directions and foster multidisciplinary collaboration among different specialists.