Download or read book The Self Induced Oscillations of Rotors written by Mikhail Y. Kushulb and published by . This book was released on with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Self Induced Oscillations of Rotors written by Mikhail Y. Kushul and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid increase in operating speeds of mechanisms and machines during the last few decades has posed mechanical and technical engineers aseries of new problems. One of these is that of the investigation of the dynamics of flexible rotors operating at speeds greater than the first- and higher-order critical speeds. In con temporary machine design we must cope with various machines and assemblies containing shafts which operate under such conditions: turbogenerators. gas and steam turbines. spinning shafts. high-capacity pumps, and a multitude of special-purpose machines. One of the problems in the dynamics of flexible rotors-the passage through the resonance state-has re cently been almost completely solved in the work of Yu. A. Mitropol'skii. F. M. Dirnentberg, V. O. Kononenko. A. P. Fillippov. and others. Much less attention has been devoted to two other interrelated problems in the dynamics of high-speed rotors: the loss of stability in regime-combining forced vibrations due to imbalance in the supercritical region, along with self-induced or self-exc1ted vibrations. These problems are rapidly becoming more important as self-induced vibrations occurring at speeds beyond the critical speed are being met with more and more often in practice [1-3]. One of the main causes for the loss of stability of a rotor in the supercritical region. as was first estab lished by Kimball in [4] and Newkirk in [5] during the ninteen-twenties, is the force due to interna1 friction.

Download or read book The Self Induced Oscillations of Rotors written by Mikhail Y. Kushul and published by Springer. This book was released on 1997-01-14 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid increase in operating speeds of mechanisms and machines during the last few decades has posed mechanical and technical engineers aseries of new problems. One of these is that of the investigation of the dynamics of flexible rotors operating at speeds greater than the first- and higher-order critical speeds. In con temporary machine design we must cope with various machines and assemblies containing shafts which operate under such conditions: turbogenerators. gas and steam turbines. spinning shafts. high-capacity pumps, and a multitude of special-purpose machines. One of the problems in the dynamics of flexible rotors-the passage through the resonance state-has re cently been almost completely solved in the work of Yu. A. Mitropol'skii. F. M. Dirnentberg, V. O. Kononenko. A. P. Fillippov. and others. Much less attention has been devoted to two other interrelated problems in the dynamics of high-speed rotors: the loss of stability in regime-combining forced vibrations due to imbalance in the supercritical region, along with self-induced or self-exc1ted vibrations. These problems are rapidly becoming more important as self-induced vibrations occurring at speeds beyond the critical speed are being met with more and more often in practice [1-3]. One of the main causes for the loss of stability of a rotor in the supercritical region. as was first estab lished by Kimball in [4] and Newkirk in [5] during the ninteen-twenties, is the force due to interna1 friction.

Download or read book Self Induced Oscillations of Rotors written by Mikhail Y Kushul and published by . This book was released on 1995-12-31 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Current Advances in Mechanical Design Production III written by S. E. A. Bayoumi and published by Elsevier. This book was released on 2016-08-04 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an up-to-date account of modern trends, techniques and case studies in the important fields of analysis and design of mechanical systems and components, production technology and industrial engineering. Topics covered include fail safe and stress analysis, dynamic analysis and control, vibrations, materials technology, manufacturing technology and productivity and computer-aided analysis of manufacturing processes. Contains 52 papers.

Download or read book Dynamics of Rotors written by O. Mahrenholtz and published by Springer. This book was released on 2014-05-04 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Hybrid Anisotropic Materials for Structural Aviation Parts written by Yosif Golfman and published by CRC Press. This book was released on 2016-04-19 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimization of aviation and space vehicle design requires accurate assessment of the dynamic stability and general properties of hybrid materials used in aviation parts. Written by a professional with 40 years of experience in the field of composite research, Hybrid Anisotropic Materials for Structural Aviation Parts provides key analysis and application examples to help the reader establish a solid understanding of anisotropic properties, theory of laminates, and basic fabrication technologies. Tools to ensure cost-effective, optimized fabrication of aircraft, satellites, space vehicles, and more... With a focus on analytic modeling and dynamic analysis of anisotropic hybrid materials used in structural parts, this book assesses how and why design mechanisms either work or fail. It describes how current manufacturing techniques can apply alternative electronic and ultrasonic systems to improve the strength of an aircraft’s parts, reduce vibrations, and counteract deicing effects, among other vital requirements. Presenting valuable case studies involving manufacturers such as Boeing and DuPont, this book covers topics including: Nano composites, impregnation processes, and stress/strain analysis New techniques for analyzing interlaminar shear distribution sandwich/carbon/fiber/epoxy technologies Non-destructive methods, control technological parameters, and the influence of technological defects Use of carbon–silicon nanotubes and ceramic technology Strength criteria and analysis, and composite life prediction methodologies Dynamic aspects and stability of jetliners and lattice aviation structures Interlaminar shear stress analysis and possible failure Fatigue strength and vibration analysis This volume offers a useful, informative summary of the cutting-edge work being done in the field of high-performance composite materials, including fiberglass and carbon. With coverage of topics ranging from stress analysis and failure prediction to manufacturing methods and nondestructive inspection technology, it provides unique information to benefit a new generation of composite designers, graduate students, and industry professionals working with high-performance structures.

Download or read book Vibration Handbooks for Helicopters written by Robert A. Wagner and published by . This book was released on 1954 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wind Energy Utilization written by University of New Mexico. Technology Application Center and published by . This book was released on 1975 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hybrid Anisotropic Materials for Wind Power Turbine Blades written by Yosif Golfman and published by CRC Press. This book was released on 2012-01-24 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on rapid technological developments in wind power, governments and energy corporations are aggressively investing in this natural resource. Illustrating some of the crucial new breakthroughs in structural design and application of wind energy generation machinery, Hybrid Anisotropic Materials for Wind Power Turbine Blades explores new automated, repeatable production techniques that expand the use of robotics and process controls. These practices are intended to ensure cheaper fabrication of less-defective anisotropic material composites used to manufacture power turbine blades. This book covers new methods of casting or pultrusion that reduce thickness in the glass- and graphite-fiber laminate prepregs used in load-bearing skin blades and web shear spars. This optimized process creates thinner, more cost-effective prepegs that still maintain strength and reliability. The book also addresses a wide range of vital technical topics, including: Selection of carbon/fiberglass materials Estimation of combination percentages Minimization and optimal placement of shear webs (spars) Advantages of resin, such as lower viscosity and curing time Strength and manufacturing criteria for selecting anisotropic materials and turbine blade materials Analysis of dynamic fatigue life and vibration factors in blade design NDE methods to predict and control deflections, stiffness, and strength Written by a prolific composite materials expert with more than 40 years of research experience, this reference is invaluable for a new generation of composite designers, graduate students, and industry professionals involved in wind power system design. Assessing significant required changes in transmission, manufacturing, and markets, this resource outlines innovative methods to help the U.S. Department of Energy meet its goal of having wind energy account for 20 percent of total generated energy by 2030.

Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1985 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1973 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Australasian Engineer written by and published by . This book was released on 1965 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wind Energy Utilization written by University of New Mexico. Technology Application Center and published by . This book was released on 1975 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Votex Shedding Induced Oscillations on a Savonius Rotor Current Meter in Situ written by Walter E. Schott and published by . This book was released on 1975 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vibration Engineering and Technology of Machinery written by Jyoti K. Sinha and published by Springer. This book was released on 2014-08-14 with total page 1110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The VETOMAC-X Conference covered a holistic plethora of relevant topics in vibration and engineering technology including condition monitoring, machinery and structural dynamics, rotor dynamics, experimental techniques, finite element model updating, industrial case studies, vibration control and energy harvesting, and signal processing. These proceedings contain not only all of the nearly one-hundred peer-reviewed presentations from authors representing more than twenty countries, but also include six invited lectures from renowned experts: Professor K. Gupta, Mr W. Hahn, Professor A.W. Lees, Professor John Mottershead, Professor J.S. Rao, and Dr P. Russhard. This work is of interest to researchers and practitioners alike, and is an essential book for most of libraries of higher academic institutes.