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Monday, July 20, 2020 | History

2 edition of Structural dynamics studies of rotating bladed disc assemblies with flexible shaft motions found in the catalog.

Structural dynamics studies of rotating bladed disc assemblies with flexible shaft motions

Robert G. Loewy

Structural dynamics studies of rotating bladed disc assemblies with flexible shaft motions

by Robert G. Loewy

  • 386 Want to read
  • 16 Currently reading

Published by AIAA .
Written in English


Edition Notes

Statementby R.G. Loewy and N. Khader.
ContributionsKhader, N.
ID Numbers
Open LibraryOL20364283M

ISBN: 8th IFToMM International Conference on Rotor Dynamics Seoul, Korea September Volume 1 of 2File Size: KB. Structural Bearing Assemblies | Disc Bearing Assembly At the time of initial publication of the AASHTO LRFD code, disc bearings were a patented product produced by one manufacturer. Ten years later, disc bearings are increasingly specified as HLMR bearing alternatives, yet little design guid-ance is provided in the current code. Therefore.

The rotation of a fast moving disc or cylindrical member can set up axial, circumferential and radial stresses. For instance, in the turbine section of an aircraft gas turbine engine, the rotor disc frequently turns at speeds in the region of r.p.m. This generates large amounts of stresses and strains on the material of the rotor disc. D. J. Ewins, “Vibration Characteristics of Bladed Disc Assemblies,” Journal of Mechanical Engineering Science , has been cited by the following article: Article. Turbine Blade Vibration Measurement Methods for Turbocharges. G Janicki 1, A Pezouvanis 1, B Mason 1, M K Ebrahimi 1.

rigid-body and flexible-body dynamics using a component mode approach, and yields a set of linear ordinary differential equations (ODEs) that can be used to explore several of the issues associated with the structural dynamics of PKMs. The accuracy of these results is verified through experimental modal testing and by: Optimization of shaft design under fatigue loading using Goodman method Deepan Marudachalam M.G, vel, araj Abstract— In this paper frequent failure of a shaft employed in a spinning machine is studied. Failure occurred at the vicinity of change in cross section of the shaft where a relief groove is present.


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Structural dynamics studies of rotating bladed disc assemblies with flexible shaft motions by Robert G. Loewy Download PDF EPUB FB2

Loewy, R.G., and Khader, N.() ‘Structural Dynamics Studies of Rotating Bladed-Disc Assemblies with Flexible Shaft Motions’, 24 th Structures Structural Dynamics and Materials Conf.

by AIAA, ASME, ASCE and AHS, Lake Tahoe, USA. Google ScholarAuthor: M. Sabuncu, A. Kaçar. Dynamics behavior of rotating bladed discs: A finite element formulation for the study of second and higher order harmonics disc element for the case of disk drive spindle systems to study the flexural vibrations and coupling between the shaft and disc.

Structural flexibility is taken into account for each component, but the centrifugal Cited by: OF ROTATING FLEXIBLE SHROUDED BLADED DISCS-SHAFT ASSEMBLIES JACEK SOKOŁOWSKI1, ROMUALD RZĄDKOWSKI1,2 AND LESZEK KWAPISZ1 1Department of Dynamics of Machines, Institute of Fluid Flow Machinery, Polish Academy of Sciences, J.

Fisz Gdansk, Poland {jsokolow,z3,kwapi}@ 2Polish Naval Academy, Śmidowi Gdynia. mode shapes of flexible shrouded bladed disc-shaft assemblies are calculated. The rotating modes are calculated by using a finite element cyclic symmetry approach. Rotational effects, such as centrifugal stiffening are accounted for, and all the possible couplings between the flexible parts are allowed.

The gyroscopic effects are neglected. Structural dynamics of rotating bladed-disk assemblies coupled with flexible shaft motions. CARNEGIE Journal of Mechanical Engineering Science 1, Cited by: Structural Dynamics of Rotating Bladed-Disk Assemblies Coupled with Flexible Shaft Motions, AIAA Journal, 22, 9, (), ().

Crossref J. Padovan and O. Paramodilok, Generalized solution of time dependent traveling load problem via moving finite element scheme, Journal of Sound and Vibration, 91, 2, (), (). Two-dimensional modeling of unilateral contact-induced shaft precessional motions in bladed-disk/casing systems Article in International Journal of Non-Linear Mechanics October with 54 Reads.

Each disc had a different number of rotor blades. Free and forced vibrations were examined using the finite element models of single rotating blades, bladed discs, and an entire rotor. Calculations of the global rotating mode shapes of flexible mistuned bladed discs-shaft assemblies took into account the excitation of the second compressor Cited by: 1.

Analysis software (in MATLAB) is associated with this book, and novices to rotordynamics can expect to make good predictions of critical speeds and rotating mode shapes within days.

The book is structured more as a learning guide than as a reference tome and provides readers with more than worked examples and more than problems and Cited by: Fluid-Structural Coupling Effects on the Dynamics of Mistuned Bladed Disks Article in AIAA Journal 45(3) March with 32 Reads How we measure 'reads'.

Analysis of Dynamic Behaviour a Rotating Shaft with Central Mono-Disk C. Chattoraj1, considered the lateral vibrations of a flexible shaft in the vicinity of critical speeds. In his analytical report the influence of preload and damping on the system dynamics.

Despite greatest care, rotors cannot be fully balanced dynamically and at File Size: 1MB. Introduction Equations of motion Structural analysis Case studies References History and scientists History and scientists 7 / 27 • –ankine R – On the centrifugal force on rotating shafts steam turbines notion of critical speed • –öppl F, – Belluzo, Stodola notion of supercritical speed • –effcott J – The lateral vibration of loaded shafts in the neighborhod.

Driven shaft Driving shaft Connector (Yoke) Cross piece A Z X l Y C B 11 A[J[MAZZEIETAL[ 1[ EQUATIONS OF MOTION] RIGID BODY MODEL Figure 0 shows a shaft AB of length l driven through a U!Joint by a driving shaft BC which spins at constant angular velocity V[ Springs and dampers are connected to the driven shaft at A as shown[ Two inertial frames are used in the derivation of the File Size: KB.

Two-dimensional modeling of unilateral contact-induced shaft precessional motions in bladed-disk/casing systems Nicolas Salvat a, Alain Batailly b, Mathias Legrand a Abstract The present work targets shaft whirling motions induced by direct blade/casing unilateral contact occurrences in Cited by: 5.

Bladed-disk vibrations were well studied because of the critical fatigue problems. They are the most stressed systems in machines. Campbell [5], Stodola [52] and Sezawa [48] are amongst the first few who studied the bladed-disks.

Kroon [25] applied difference calculus to the case of lashed blades to determine the blade stresses. The focus of this literature survey and review is model reduction methods and their application to rotor dynamic systems. Rotor dynamic systems require careful consideration in their dynamic models as they include unsymmetric stiffness, localized nonproportional damping, and frequency-dependent gyroscopic effects.

The literature reviewed originates from both controls and mechanical systems Cited by: Title: Vibration Analysis of Bladed Disc Assemblies: Authors: Minas, C.; Kodiyalam, S. Publication: Proc. SPIE Vol.Proceedings of the 13th International Modal.

1 DYNAMIC ANALYSIS OF A ROTATING COMPOSITE SHAFT S. Ghoneam 1, a, A. Hamada 1, b and M. EL-Elamy 1, c 1Department of Production Engineering and Mechanical Design, Faculty of Engineering, Menoufiya University, Shebin El-Kom, Egypt [email protected], [email protected], [email protected] Keywords: Rotating Composite Shaft, File Size: KB.

This paper presents a fully bladed flexible rotor and outlines the associated stability analysis. From an energetic approach based on the complete energies and potentials for Euler-Bernoulli beams, a system of equations is derived, in the rotational frame, for the rotor.

This later one is made of a hollow shaft modelled by an Euler-Bernoulli beam supported by a set of by: 7. The vibration of the bladed disc has been obtained by superposing vibrations of discs assumed to have a single blade respectively, so that the exciting condition has been derived.

This condition depends upon the relations among the number of rotating blades, the number of exciting sources on the stationary side and the number of diametral nodal Cited by:.

shaft dynamics. Another example is the method used to measure the eccentricity of internal combustion engine cylinders, in which the rotating shaft (positioned inside the cylinder) has a sensor at the free end that measures proximity to the cylinder.Model and Stability Analysis of a Flexible Bladed Rotor Nicolas Lesaffre, Jean-Jacques Sinou, Fabrice Thouverez.

Model and Stability Analysis of a Flexible Bladed Rotor. International Journal of Rotating Machinery, Hindawi Publishing Corporation,(precession motions in the same sense of rotation as the own rotation of the shaft.Design of Shaft A shaft is a rotating member usually of circular cross-section (solid or hollow), which transmits power and rotational motion.

Machine elements such as gears, pulleys (sheaves), flywheels, clutches, and sprockets are mounted on the shaft and are used to transmit power from the driving device (motor or engine) through a machine.