مجموعة كتب Vibration ,Damping

All mechanical equipment in motion generates a vibration profile, or signature, that reflects its operating condition. This is true regardless of speed or whether the mode of operation is rotation, reciprocation, or linear motion. There are several predictive maintenance techniques used to monitor and analyze critical machines, equipment, and systems in a typical plant. These include vibration analysis, ultrasonics, thermography, tribology, process monitoring, visual inspection, and other nondestructive analysis techniques. Of these techniques, vibration analysis is the dominant predictive maintenance technique used with maintenance management programs, and this book explains the basic theory, applications, and benefits in one easy-to-absorb volume that plant staff will find invaluable

Illustrated with over 150 figures, this text for researchers and development engineers (and interested graduate students) describes various practical and economical approaches to dealing with gear noise and vibration. The focus is on basic non-mathematical ideas of how vibrationis generated by the transmission error and how it progresses through the system. The second edition offers new coverage of high- and low- contact ratio gears. Smith teaches engineering at Cambridge University

Most machines and structures are required to operate with low levels of vibration as smooth running leads to reduced stresses and fatigue and little noise. This book provides a thorough explanation of the principles and methods used to analyse the vibrations of engineering systems, combined with a description of how these techniques and results can be applied to the study of control system dynamics. Numerous worked examples are included, as well as problems with worked solutions, and particular attention is paid to the mathematical modelling of dynamics systems and the derivation of the equations of motion

Vibration and shock are ubiquitous phenomena, and a modern, practical reference for the field is overdue. This impressive new Vibration and Shock Handbook provides a thoroughly up-to-date, convenient, and authoritative reference on the techniques, tools, and data relevant to the modeling, analysis, design, instrumentation, and control of vibration, shock, noise, and acoustics. In 45 chapters contributed by professionals in current practice, the book covers both the theoretical and the practical aspects, including the use of MATLABA® toolboxes and LabVIEWA® tools. It provides a wealth of examples and case studies and presents all of the material in a format ideal for easy reference and recollection

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Rotating machinery (eg pumps, motors, compressors) is normally manufactured to precise measurements but there comes a point when the costs of manufacture mean that further precision is not cost-effective and thus any slight imbalance inherent in the machine will need to be attended to after manufacture. When such machinery is in operation, often at very high speeds of thousands of revs per minute, any imbalance will set up vibration and often noise. In addition, such imbalance will cause extra wear and loss of efficiency in the machine. The answer is to balance the affected parts of the machine so that it operates smoothly and efficiently.

Vibration: Fundamentals and Practice provides the background and techniques that allow successful design, analysis, and modification of vibration in mechanical systems. It focuses on the practical aspects of vibration-the applications and design considerations directly related to modifying vibrational behavior in mechanical devices and structures. The author presents a uniform and coherent treatment of the subject, integrating material on instrumentation, experimentation, design, and control and offering numerous case studies and worked examples. Introduces practical applications and experimental techniques in the very beginning, then uniformly integrates them throughout the book o Provides mathematics and dynamics background in appendices Includes many worked examples and case studies o Describes the industry-standard and state-of-the-art software tools for analysis and design of vibratory systems and illustrates them with examples o Offers analogies to other oscillatory systems, such as electrical and fluid systems, and contrasts these with thermal

Vibration with Control is an essential text for practitioners, researchers, and graduate students as it can be used as a reference text for its complex chapters and topics, or in a tutorial setting for those improving their knowledge of vibration and learning about control for the first time. Whether or not you are familiar with vibration and control, this book is an excellent introduction to this emerging and increasingly important engineering discipline

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Flexible mechanical systems experience undesirable vibration in response to environmental and operational forces. The very existence of vibrations can limit the accuracy of sensitive instruments or cause significant errors in applications where high-precision positioning is essential so in many situations control of vibrations is a necessity. Piezoelectric transducers have been used in countless applications as sensors, actuators, or both. When traditional passive vibration control techniques fail to meet requirements, piezoelectric transducers in conjunction with feedback controllers can be used effectively to suppress vibrations. Piezoelectric Transducers for Vibration Control and Damping presents recent developments in vibration control systems that employ embedded piezoelectric sensors and actuators. In particular, it covers various ways in which active vibration control systems can be designed for piezoelectric laminated structures, paying distinct attention to how such control systems can be implemented in real time. The text contains numerous examples and experimental results obtained from laboratory-scale apparatus, with details of how similar setups can be built. Features and topics: An overview of piezoelectricity. Modelling of flexible structures with embedded piezoelectricsensors and actuators. Feedback control of structural vibration using PPF and resonant controllers. A comprehensive treatment of piezoelectric shunt Damping systems using systems-theoretic tools. A paradigm for designing active high-performance piezoelectric shunts. Innovative techniques to deal with the problem of hysteresis in piezoelectric transducers. Instrumentation for piezoelectric sensors and actuators. Applications in atomic force and scanning tunneling microscopy. An essential text and reference for graduates, researchers, and professionals working in mechanical engineering, aerospace engineering and mechatronics disciplines, this book will be a specially useful resource for scientists and engineers engaged in Vibration Control research

Vibration, excessive noise and other dynamics-related problems that limit or prevent operation are a major manufacturing concern in airplanes, auto crankshafts, home appliances, etc. This detailed monograph provides in-depth coverage of state-of-the-art vibration analysis techniques used to prevent design and operational malfunction

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Introduction to Random Vibrations, Spectral and Wavelet Analysis

This book is a substantially expanded edition of An Introduction to Random Vibrations and Spectral Analysis which now covers wavelet analysis. Basic theory is thoroughly described and illustrated, with a detailed explanation of how discrete wavelet transforms work. Computer algorithms are expalined and supported by examples and set of problems. An appendix lists 10 computer programs for calculating and displaying wavelet transforms

Clear and concise descriptions are given of the techniques for mathematically modelling real structures so that the equations which describe the motion of such structures can be derived. This approach leads to a comprehensive discussion of the analysis of typical models of vibrating structures excited by a range of periodic and random inputs. Careful consideration is also given to the sources of excitation, both internal and external, and the effects of isolation and transmissability. A major part of the book is devoted to Damping of structures and many sources of damping are considered, as are the ways of changing damping using both active and passive methods. The numerous worked examples liberally distributed throughout the text, amplify and clarify the theoretical analysis presented. Particular attention is paid to the meaning and interpretation of results, further enhancing the scope and applications of analysis. Over 80 problems are included with answers and worked solutions to most. This book provides engineering students, designers and professional engineers with a detailed insight into the principles involved in the analysis and damping of structural vibration while presenting a sound theoretical basis for further study

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Incorporating the use of MATLAB to help with the solution of problems, this text explores the subject of vibration from a fairly sophisticated, mathematical point of view. With a three degree-of-freedom (DOF) system as a unifying theme, the author develops the associated equations of motion, then in each chapter includes both a closed-form solution and the MATLAB code for solving a problem. The book's unique approach makes it especially useful for engineers who lack experience with state space, and it will prove useful to both the mechanical and control engineering communities in enhancing their ability to communicate.
Collects in one document various methods of constructing and representing mechanical models, helping the reader develop a strong understanding of model analysis, and showing how to take results of large dynamic finite element models and build small MATLAB state space dynamic mechanical models for use in system models. DLC: Vibration--Computer simulation

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In this new edition the scope of the book has been widened to include topics such as isospectral systems- families of systems which all exhibit some specified behaviour; applications of the concept of Toda flow; new, non-classical approaches to inverse Sturm-Liouville problems; qualitative properties of the modes of some finite element models; damage identification. With its emphasis on analysis, on qualitative results, rather than on computation, the book will appeal to researchers in vibration theory, matrix analysis, differential and integral equations, matrix analysis, non-destructive testing, modal analysis, vibration isolation, etc.