ایزولاسیون لرزش غیرفعال

Provides background theory and practical solutions for engineers that face vibration problems causing equipment failure, downtime, and extra maintenance costs. It emphasizes proven, effective techniques that are not yet widely used on equipment for microelectronics, MEMS, and nanotechnology, as well as process plants, power generation, oil, gas, petrochemicals, and other industries. Vibration isolation is a vibration control technique in which the source of vibration excitation and the object to be protected are separated by an auxiliary system comprising special devices called vibration isolators or vibration isolating mounts. The four chapters of the book describe: basic analytical tools for designing such systems principles and criteria for assigning principal parameters (natural frequencies and damping values) necessary for successful functioning of passive vibration isolation systems for major groups of objects (vibration-sensitive objects, vibration-generating objects, general purpose machinery) static and dynamic characteristics of the most widely used materials for vibration isolators basic designs of vibration isolators for various applications Addressing practitioners, the book offers problems and solutions relevant not only to the isolation of stationary sensitive equipment, but also to civil engineering and transport applications. Today, tolerances on acceptable levels of vibration are becoming more stringent, just as the number and intensity of vibration sources is increasing - for example, as machine operating speeds become faster, or cutting inserts in machine tools improve to allow heavier cuts. Passive Vibration Isolation enables practitioners to make better informed and more effective choices when solving vibration problems Production equipment for microelectronics, MEMS, and nanotechnology cannot function without vibration isolation. Process plant, power generation machinery, oil, gas, and petrochemical equipment are all subject to vibration. This vibration causes a range of problems and headaches for the engineer that can lead to failure of equipment, downtime, and extra maintenance costs. Isolating vibration and ameliorating it is vital. This valuable and well written text provides a comprehensive treatment of the principles of design and means for realization of passive vibration isolation systems for real life objects. A special emphasis is given to effective techniques and methods that are not yet widely used in the practice of vibration isolation in industry. It is written with practitioners in mind and many of the problems addressed and the solutions presented are relevant not only to the isolation of stationary sensitive equipment but also to civil engineering and transport applications. The contents Inertia and geometric properties of typical machines and other mechanical devices; Dynamics of single degreeof freedom vibration isolation system; Vibration isolation system under random excitation; Isolation of vibration sensitive objects; Vibration isolation systems -isolation requirements for vibration producing objects; Engine and machinery mounting in vehicles; Elasto damping materials (EDM); High damping metals; Material selection for vibration isolators; Vibration isolators with metal flexible elements; High angular stiffness and anisotropic vibration isolation systems; Pneumatic isolators; and Power transmission couplings. Content: Dynamic Properties of Vibration Isolation Systems -- Inertia and Geometric Properties of Typical Machines and Other Mechanical Devices -- Basic Characteristics of Elastic Mounts (Vibration Isolators) -- Elastically Supported Solid Object Dynamic Coupling -- Dynamics of Single-Degree-of-Freedom Vibration Isolation System -- Vibration Isolator with Viscous Damper -- Vibration Isolator with Internal (Hysteresis) Damping -- "Relaxation" Isolation System with Viscous Damper -- Single-Degree-of-Freedom System with Motion Transformation -- Dynamics of Two-Degrees-of-Freedom Vibration Isolation System -- Generic Two-Degrees-of-Freedom System with Damping -- Vibration Isolator with Intermediate Mass (Two-Stage Isolator) -- Three-Degrees-of-Freedom (Planar) Vibration Isolation System -- Dynamics of Planar Isolation System -- Natural Frequencies of Planar Vibration Isolation System -- Planar Vibration Isolation System with Inclined Mounts -- Focal Equi-Frequency System -- Vibration Isolation System under Random Excitation -- Travel of Random Vibration Through Dynamic System -- Vibration Isolation System under Pulse Excitation -- Nonlinearity in Vibration Isolation Systems -- Wave Effects in Vibration Isolators -- Principles and Criteria of Vibration Isolation -- Damping vs. Heat Generation in Vibration Isolators -- Isolation of Vibration-Sensitive Objects -- Ambient Vibrations -- Detrimental Effects of Vibration -- Model of Vibration Transmission -- Principles and Criteria of Vibration Isolation -- Isolation from Steady-State Vibration. "This book provides a comprehensive treatment of the principles of design and means for realization of passive vibration isolation systems for real life objects. A special emphasis is given to effective techniques and methods that are not yet widely used in the practice of vibration isolation in industry.". "The book is written with practitioners in mind and many of the problems addressed and the solutions presented are relevant not only to the isolation of stationary sensitive equipment (the main thrust of the book), but also to civil engineering and transport applications."--BOOK JACKET. Production equipment for microelectronics, MEMS, and nanotechnology cannot function without vibration isolation. This book provides a comprehensive treatment of the principles of design and means for realization of passive vibration isolation systems for real life objects.