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Deflection And Vibration Characteristics Of Rotating Systems Supported By Rolling Element Bearings
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Book Synopsis Deflection and vibration characteristics of rotating systems supported by rolling element bearings by : John William Bedenbender
Download or read book Deflection and vibration characteristics of rotating systems supported by rolling element bearings written by John William Bedenbender and published by . This book was released on 1967 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Elastic Contact Theory for Modeling Vibration Transmissibility Through Rolling Element Bearings by :
Download or read book An Elastic Contact Theory for Modeling Vibration Transmissibility Through Rolling Element Bearings written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rolling element bearings are a class of mechanism used to support and locate rotating shafts. Their construction and geometry is relatively complex. Even though they allow free rotation between the inner and outer raceways, translational vibration can still transmit through the bearings forming one of the major structure-borne paths in rotating machineries. Previous bearing load-deflection analysis is based on the Hertzian theory that describes the idealized contact between two bodies. The Hertzian contact theory also assumes one body as rigid and other mating pair as elastic. In the case of bearing analysis, the rolling elements are assumed elastic while the raceways are considered rigid, which tends to over-simplified the problem. In this thesis research, a more realistic contact model is introduced to improve the vibration response of rolling element-bearing systems as described below. The primary objective of this research is to apply an elastic contact theory to formulate a new bearing stiffness matrix for use in predicting the vibration response of rotating systems and analyzing the vibration transmission through rolling element bearings. This proposed theory also accounts for the time-varying stiffness characteristics of the bearing due to orbital rotation of the rolling elements. Using the proposed bearing model, numerous parametric studies are performed to improve the understanding of the role of bearings in vibration transmission. The model is also employed to demonstrate the salient features. Obtrusive discrepancies are observed amongst the two theories for force preloading cases. Lumped parameter dynamic models based on the new contact-elastic theory are developed to study vibration transmission characteristics through single stage rotor and geared rotor systems. Also, the centrifugal force, which is shown to have significant effect on the rotating system natural frequencies, is included in the new formulation. This effect is found more acute in angular contact ball bearings compared to other conventional designs.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Advanced Dynamics of Rolling Elements by : P.K. Gupta
Download or read book Advanced Dynamics of Rolling Elements written by P.K. Gupta and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: In any rotating machinery system, the bearing has traditionally been a crit ical member of the entire system, since it is the component that permits the relative motion between the stationary and moving parts. Depending on the application, a number of different bearing types have been used, such as oil-lubricated hydrodynamic bearings, gas bearings, magnetic suspensions, rolling element bearings, etc. Hydrodynamic bearings can provide any desired load support, but they are limited in stiffness and the associated power loss may be quite large. Gas bearings are used for high-precision applications where the supported loads are relatively light, bearing power losses are very low, and the rotating speeds generally high. For super precision components where no frictional dissipation or bearing power loss can be tolerated, magnetic suspensions are employed; again, the load support requirements are very low. Rolling element bearings have been widely used for those applications that require greater bearing versatility, due to the requirements for high-load and high-stiffness characteristics, while allowing moderate power loss and permitting variable speeds. A study of the dynamic interaction of rolling elements is, therefore, the subject of this text. Texts covering the analysis and design methodology of rolling elements are very limited. Notable works include Analysis of Stresses and Deflections (Jones, 1946, Vols. I and II), Ball and Roller Bearings, Their Theory, Design and Application (Eschmann, Hasbargen, and Weigand, 1958), Ball and Roller Bearing Engineering (Palmgren, 1959, 3rd ed. ), Advanced Bearing Technology (Bisson and Anderson, 1965), and Rolling Bearing Analysis (Harris, 1966).
Book Synopsis Vibration Transmission Through Rolling Element Bearings in Geared Rotor Systems by : Rajendra Singh
Download or read book Vibration Transmission Through Rolling Element Bearings in Geared Rotor Systems written by Rajendra Singh and published by DIANE Publishing. This book was released on 1990 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new mathematical model is proposed to examine the vibration transmission through rolling element bearings in geared rotor systems. Current bearing models, based on either ideal boundary conditions for the shaft or purely translational stiffness element description, cannot explain how the vibratory motion may be transmitted from the rotating shaft to the casing. For example, a vibration model based upon the simple bearing formulations can only predict purely in-plane type motion on the flexible casing plate given only bending motion on the shaft. However, experimental results have shown that the casing plate motion is primarily flexural. This study clarifies this issue qualitatively and quantitatively by developing a comprehensive bearing stiffness matrix is partially verified using available analytical and experimental data, and is completely characterized. This study extends the proposed bearing formulation to analyze the overall geared rotor system dynamics including casting and mounts. The bearing stiffness matrix is included in discrete system models using lumped parameter and/or dynamic finite element techniques. Eigensolution and forced harmonic response due to rotating mass unbalance or kinematic transmissions error excitation for the following examples are computed: (I) single-stage rotor system with flexible shaft supported by two bearings on rigid casing and flexible mounts, (II) spur gear pair system with motor and load inertials attached to two flexible shafts and supported by four bearings on flexibly mounted rigid casing, and (III) case II with flexible casing and rigid mounts. In several of these examples, analytical predictions compare well with measured data, validating the purposed formulation.
Book Synopsis Linear and Nonlinear Rotordynamics by : Yukio Ishida
Download or read book Linear and Nonlinear Rotordynamics written by Yukio Ishida and published by John Wiley & Sons. This book was released on 2013-03-05 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wide-ranging treatment of fundamental rotordynamics in order to serve engineers with the necessary knowledge to eliminate various vibration problems. New to this edition are three chapters on highly significant topics: Vibration Suppression - The chapter presents various methods and is a helpful guidance for professional engineers. Magnetic Bearings - The chapter provides fundamental knowledge and enables the reader to realize simple magnetic bearings in the laboratory. Some Practical Rotor Systems - The chapter explains various vibration characteristics of steam turbines and wind turbines. The contents of other chapters on Balancing, Vibrations due to Mechanical Elements, and Cracked Rotors are added to and revised extensively. The authors provide a classification of rotating shaft systems and general coverage of key ideas common to all branches of rotordynamics. They offers a unique analysis of dynamical problems, such as nonlinear rotordynamics, self-excited vibration, nonstationary vibration, and flow-induced oscillations. Nonlinear resonances are discussed in detail, as well as methods for shaft stability and various theoretical derivations and computational methods for analyzing rotors to determine and correct vibrations. This edition also includes case studies and problems.
Book Synopsis Condition Monitoring on Vibration Characteristics of Rolling Element Bearings by :
Download or read book Condition Monitoring on Vibration Characteristics of Rolling Element Bearings written by and published by . This book was released on 1999 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theory of the Vibration of Rotating Shafts by : Warren Weaver
Download or read book Theory of the Vibration of Rotating Shafts written by Warren Weaver and published by . This book was released on 1917 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics of Rotating Machines by : M. I. Friswell
Download or read book Dynamics of Rotating Machines written by M. I. Friswell and published by Cambridge University Press. This book was released on 2010-03-31 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enables engineers to understand the dynamics of rotating machines, from basic explanations to detailed numerical models and analysis.
Book Synopsis Essential Concepts of Bearing Technology by : Tedric A. Harris
Download or read book Essential Concepts of Bearing Technology written by Tedric A. Harris and published by CRC Press. This book was released on 2006-10-09 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part of the fifth edition of the classic Rolling Bearing Analysis, this book builds a basic understanding of the fundamentals underlying the use, design, and performance of rolling bearings. It serves as a stand-alone introduction cutting across the array of disciplines necessary to evaluate and comprehend the performance and behavior of all types of rolling bearings. The authors derive the mathematics and theories underlying catalog values given by manufacturers and lead you from the various types of bearings through bearing geometry, applied loading, internal load distribution, deformation, functional performance, and structural materials. It makes an ideal introductory textbook as well as a practical field reference for professionals.
Book Synopsis Elasto-Hydrodynamic Lubrication by : D. Dowson
Download or read book Elasto-Hydrodynamic Lubrication written by D. Dowson and published by Elsevier. This book was released on 2014-07-18 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elasto-Hydrodynamic Lubrication deals with the mechanism of elasto-hydrodynamic lubrication, that is, the lubrication regime in operation over the small areas where machine components are in nominal point or line contact. The lubrication of rigid contacts is discussed, along with the effects of high pressure on the lubricant and bounding solids. The governing equations for the solution of elasto-hydrodynamic problems are presented. Comprised of 13 chapters, this volume begins with an overview of elasto-hydrodynamic lubrication and representation of contacts by cylinders, followed by a discussion on equations relevant to lubrication, including the Reynolds equation. The reader is then introduced to lubrication of rigid cylinders; the importance of film thickness in highly loaded rigid contacts; the elasticity of solids in contact; and the theory of elasto-hydrodynamic lubrication. Subsequent chapters focus on apparatus and measurements of film thickness and film shape; friction and viscosity; and lubrication of gears and roller bearings. This book will be of interest to tribologists.
Book Synopsis The Dynamic Characterisation of Rolling-element Bearings by : Matej Razpotnik
Download or read book The Dynamic Characterisation of Rolling-element Bearings written by Matej Razpotnik and published by . This book was released on 2019 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transmission of vibration through rolling-element bearings is a major topic of interest with respect to the modern rotating machinery. Due to the complex contact conditions the bearing modelling as part of a wider system primarily remains on the analytical level. This work discusses in the first part the adequacy of current analytical bearing models by comparing their load-displacement characteristics. Afterwards the bottom-up investigation of a system is presented. Based on precisely known dynamic properties of all integral parts but bearings we asses the dynamic bearing model. The next part of this work describes the numerical issues that appears when calculating the time response of a system containing rolling-element bearings. A derivation of smooth contact-state transition model is presented that ensures faster and stable integration procedure. In the last part the statically indeterminate system containing rolling-element bearings is investigated. More unknowns than available equations require a new numerical approach to calculate a resulting equilibrium of the system.
Download or read book Dissertation Abstracts written by and published by . This book was released on 1967 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rolling Bearing Analysis by : Tedric A. Harris
Download or read book Rolling Bearing Analysis written by Tedric A. Harris and published by John Wiley & Sons. This book was released on 1966 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics of Rotating Shafts by : Robert G. Loewy
Download or read book Dynamics of Rotating Shafts written by Robert G. Loewy and published by . This book was released on 1970 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vibration Measurement of Rolling Element Bearing by : Mohammad Nurul Hoque
Download or read book Vibration Measurement of Rolling Element Bearing written by Mohammad Nurul Hoque and published by LAP Lambert Academic Publishing. This book was released on 2011-07 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rolling Element bearings are among the most common elements used in the operation of rotating machines. They are, however, one of the weak points in these machines where a large majority of problems associated are caused by bearing failures. As a result, condition monitoring of the rolling element bearings are important in order to keep these machineries in their proper operating condition. Analysis and maintenance of any rolling element bearings failures are made much easier if any fault can be identified during its early stage. Thus, it is the aim of this book to investigate the relative shaft displacement and bearing housing vibration measurements for the early fault detection in rolling element bearings. Experiments were conducted on a rotor Kit that closely simulates the actual behaviour of rotating machines.
Download or read book ASME Technical Papers written by and published by . This book was released on 2001 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
