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Turbomachine Blade Vibration
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Book Synopsis Turbomachine Blade Vibration by : J. S. Rao
Download or read book Turbomachine Blade Vibration written by J. S. Rao and published by New Age International. This book was released on 1991 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue Failures Of Blades Is One Of The Most Vexing Problems Of Turbomachine Manufacturers, Ever Since The Steam Turbine Became The Main Stay For Power Generating Equipment And Gas Turbines Are Increasingly Used In The Air Transport. The Problem Is Very Complex, Involving The Excitation Due To Aerodynamic Stage Interaction; Damping Due To Material Deformation, Friction At Slip Surfaces And Aerodynamic Damping; Vibration Of An Asymmetric Aerofoil Tapered Along Its Length And Mounted On A Rotating Disc At A Stagger Angle. The Problem Is Also Governed By Heat Transfer Analysis And Thermal Stresses.His Book Deals With A Basic Understanding Of Free Vibratory Behaviour Of Turbine Blades- Free Standing, Packetted, And Bladed-Discs. The Analysis Is Based On Continuous And Discrete Models Using Energy Principles And Finite Element Techniques. A Clear Understanding Of The Interference Phenomenon In A Thin Cambered Airfoil Stage In Subsonic Flow Is Presented To Determine The Nonsteady Excitation Forces Acting On The Blades. A Comprehensive Treatment On The Blade Damping Phenomenon That Occurs In Turbines Is Given. The Nonlinear Damping Models Account For Material Damping And Friction Damping As A Function Of Rotational Speed For Each Mode. Resonant Response Calculation Procedures For The Steadily Running As Well As Accelerating Blades Are Given.Cumulative Damage Calculations Are Then Outlined For Fatigue Life Estimation Of Turbomachine Blades. The Book Also Deals With Heat Transfer Analysis And Thermal Stress Calculations Which Help In A Comprehensive Understanding Of The Blade Problems.
Book Synopsis Turbine Blade Life Estimation by : J. S. Rao
Download or read book Turbine Blade Life Estimation written by J. S. Rao and published by Alpha Science Int'l Ltd.. This book was released on 2000 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: The blade life estimation is a multifaceted technology, involving free and forced vibration forces, that lead to the determination of steady and dynamic stresses at different critical speeds during the startup and shutdown procedures, as well as in the operational speed range. Propagation and unstable fracture are described with practical examples to estimate blade life.
Book Synopsis Evaluation of Optical Techniques Applied to Online Turbomachinery Blade Vibration Measurements by : Benjamin Gwashavanhu
Download or read book Evaluation of Optical Techniques Applied to Online Turbomachinery Blade Vibration Measurements written by Benjamin Gwashavanhu and published by . This book was released on 2015 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the dynamic characteristics of blades is important in the online condition monitoring of turbomachinery. Conventionally contact methods are used for this purpose. However improvements in technology now allow for the use of non-contact methods. Contact measurement techniques for turbomachinery blade vibration analysis typically involve the use of strain gauges and accelerometers. These present some complications when analyzing rotating machinery. Being contact in nature, mass loading can affect the integrity of measurements captured. Turbomachines typically operate under the adverse conditions of high temperatures, high flow rates and sometimes wet environments. This significantly reduces the life of contact transducers installed to capture the blade dynamics. Installation of telemetry systems for signal transmission is also necessary. In addition to being invasive and expensive, telemetry systems can introduce electrical noise. These factors make it desirable to explore the applicability of various optical non-contact methods for analyzing turbomachine blade vibrations, such as Laser Doppler Vibrometry (LDV) and photogrammetry. Both techniques have been successfully used to analyze vibrations of structures. Photogrammetry is a full-field measurement technique which allows for non-intrusive simultaneous measurement of vibrations at different locations on a blade. This is particularly important for the updating of numerically developed models of structures, investigation of structural global dynamics, and more effective localization of damage. Accelerometers have been used to validate a variation of photogrammetry, three dimensional point tracking (3DPT), for rotational applications and discrepancies attributed to the contact nature of accelerometers were observed. To build confidence in the use of 3DPT as a non-contact method for analyzing rotating machines, it is necessary to investigate how well it correlates with various non-contact methods.
Book Synopsis Turbine Blade Vibrations by : Howard W. Butler
Download or read book Turbine Blade Vibrations written by Howard W. Butler and published by . This book was released on 1954 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gas Turbine Blade Vibration by : Adam Raczyński
Download or read book Gas Turbine Blade Vibration written by Adam Raczyński and published by LAP Lambert Academic Publishing. This book was released on 2010 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Blade vibration is one of the most significant causes of high cycle fatigue failure in gas turbine engines. A correctly conducted modal analysis can accurately predict the values of natural frequency. The most commonly used tool for such purpose is software based on Finite Element Method. Compared to experimental tests it is less costly, more time efficient and can incorporate phenomena which are not possible to include in experimental measurements. To perform such analysis correctly one must be aware of several significant parameters that should not be omitted in the model definition. This work focuses on main influencing factors such as working temperature, rotational speed, blade root stiffness and examines their effects. In addition it studies the importance of boundary conditions in the FEM model and verifies possible geometrical simplifications that could optimize the solution process. This analysis should be useful to engineers working on turbine blade vibration. The conclusions contained in the work can serve as guidelines for optimizing the process of turbine blade modal analysis and may help FE software users to obtain most accurate results in the least time.
Book Synopsis Experimental Validation of Turbomachinery Blade Vibration Predictions by : Ibrahim Ata Sever
Download or read book Experimental Validation of Turbomachinery Blade Vibration Predictions written by Ibrahim Ata Sever and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Torsional Vibration of a Rotating Tapered-twisted Turbomachine Blade by : R. M. Krupka
Download or read book Torsional Vibration of a Rotating Tapered-twisted Turbomachine Blade written by R. M. Krupka and published by . This book was released on 1970 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbomachinery Blade and Stage Vibrations by : Patrick McComb
Download or read book Turbomachinery Blade and Stage Vibrations written by Patrick McComb and published by . This book was released on 2013 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbine Blade Vibration Analysis by : Eduardo E. Ho
Download or read book Turbine Blade Vibration Analysis written by Eduardo E. Ho and published by . This book was released on 2003 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Implementation of an FEA vibrationmodel and a shake table test of a turbine blade to obtain the blade vibration characteristics.
Book Synopsis Theoretical and Experimental Analysis of the Reduction of Rotor Blade Vibration in Turbomachinery Through the Use of Modified Stator Vane Spacing by : Richard H. Kemp
Download or read book Theoretical and Experimental Analysis of the Reduction of Rotor Blade Vibration in Turbomachinery Through the Use of Modified Stator Vane Spacing written by Richard H. Kemp and published by . This book was released on 1958 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental verification of the analysis was obtained by using an air-interrupter disk and comparing the vibration amplitudes of turbine blades in a turbojet engine when two different nozzle vane configurations were used. One was an equally spaced vane configuration, and the other was one which the analysis had indicated would result in a reduction of the excitation level. The measured amplitudes of vibration of the turbine blades during engine operation compared favorably with those predicted by the analysis.
Book Synopsis Turbine Blade Vibrations of Turbochargers by : V. A. Zastrow
Download or read book Turbine Blade Vibrations of Turbochargers written by V. A. Zastrow and published by . This book was released on 1967 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vibration Analysis of Grouped Turbine Blades by : Laurence Floyd Wagner
Download or read book Vibration Analysis of Grouped Turbine Blades written by Laurence Floyd Wagner and published by . This book was released on 1993 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of Turbomachinery Blade Vibration by : Daniel Heller
Download or read book Experimental and Numerical Investigation of Turbomachinery Blade Vibration written by Daniel Heller and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Vibration of Blades in Axial Turbomachinery. Part Ii. Design and Development Handbook by : NORTHERN RESEARCH AND ENGINEERING CORP CAMBRIDGE MASS.
Download or read book The Vibration of Blades in Axial Turbomachinery. Part Ii. Design and Development Handbook written by NORTHERN RESEARCH AND ENGINEERING CORP CAMBRIDGE MASS. and published by . This book was released on 1965 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volume is devoted to a review of the various aspects of the problems of vibration in axial-turbomachine blades. The volume contains a description and listing of the computer program NATURAL FREQUENCIES, as well as a discussion of its application in practice. Information is given on the preparation of the various input data and the interpretation of the computer output. A step-by-step design method for a typical axial turbomachine is described. Finally, a description of a typical development program is presented together with a guide to the diagnosis and mitigation of troublesome vibrations. (Author).
Book Synopsis The Vibration of Blades in Axial Turbomachinery. Part I. Theory and Practice of Design and Development by : NORTHERN RESEARCH AND ENGINEERING CORP CAMBRIDGE MASS.
Download or read book The Vibration of Blades in Axial Turbomachinery. Part I. Theory and Practice of Design and Development written by NORTHERN RESEARCH AND ENGINEERING CORP CAMBRIDGE MASS. and published by . This book was released on 1965 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volume describes the various causes of vibration together with methods of assessing their seriousness. A program was developed for predicting the natural frequencies of cantilevered blades, as the frequencies of resonant vibrations are usually close to these natural frequencies. Also included is a description of the experimental techniques which may be used to determine the vibrational characteristics of axial-turbomachine blades. (Author).
Book Synopsis On the vibration of axial-flow turbomachine blades by :
Download or read book On the vibration of axial-flow turbomachine blades written by and published by . This book was released on 1970 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbine Blade Vibration Behavior Under Nonlinear Friction Damping by : Waldemar Joseph Janowski
Download or read book Turbine Blade Vibration Behavior Under Nonlinear Friction Damping written by Waldemar Joseph Janowski and published by . This book was released on 1989 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
