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Sunday, May 3, 2020 | History

2 edition of Dynamic analysis of geared rotors by finite elements found in the catalog.

Dynamic analysis of geared rotors by finite elements

Dynamic analysis of geared rotors by finite elements

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  • 33 Currently reading

Published by National Aeronautics and Space Administration, US Army Aviation Systems Command, R&T Activity, [For sale by the National Technical Information Service in [Washington, DC], [St. Louis, Mo.], Springfield, Va .
Written in English

    Subjects:
  • Mechanical engineering.,
  • Gearing.,
  • Rotors -- Dynamics.

  • Edition Notes

    StatementAhmet Kahraman ... [et al.].
    SeriesNASA technical memorandum -- 102349., USAAVSCOM technical report -- 89-C-006., AVSCOM technical memorandum -- 89-C-6.
    ContributionsKahraman, Ahmet., United States. Army Aviation Research and Technology Activity., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15285883M

    Monitoring the condition of various rotor elements and systems is covered in Chapter Analysis of rotors integrated with active magnetic bearings is covered in Chap with an emphasis on dynamics and control of the rigid and flexible rotors. Overall the book contains all the facets of the rotor analysis and identification. Rotor Dynamic Analysis on Personal Computers V. K. Obeid 41 Evaluation of Pivot Stiffness for Typical Tilting Pad Journal Bearing Designs R. G. Kirk and S. W. Reedy 49 Identification of the Dynamic Characteristics of Oil-Film Bearings Q. Zhang, G. Lallement, and R. Fillod 57 A Versatile Finite Element Analysis of Journal Bearings and Oil Film.

    Abstract. 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. CHAPTER 1 A BRIEF HISTORY OF ROTOR DYNAMICS AND RECENT TRENDS From the Rankine to Jeffcott Rotor Models Rotor Dynamics Phenomena Studies from Stodola to Lund Development of Rotor Dynamics Analysis Tools Software for Rotor Dynamics Analysis Dynamic Balancing of Rotors Condition Monitoring of Rotating Machineries Conferences on Rotordynamics .

    Full text of "J. S. Rao - History of Rotating Machinery Dynamics" See other formats. Dynamic analysis of complex rotor forms became a necessity, while the importance of approximate methods for dynamic analysis was stressed. Finally, the emergence of fracture mechanics, as a new branch of applied mechanics, provided analytical tools to investigate crack influence on the dynamic behavior of rotors. The scope of this book is based.


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Dynamic analysis of geared rotors by finite elements Download PDF EPUB FB2

Dynamic Analysis of Geared Rotors by Finite Elements A. Kahraman, A. Kahraman. Dynamic Analysis of a Geared Rotor-Bearing System With Viscoelastic Supports Under the Bow Effect. GT Related Chapters. Updates, Revisions and Corrections to this Book.

Supplement to Fluid Mechanics, Water Hammer, Dynamic Stresses, and Piping by: Get this from a library. Dynamic analysis of geared rotors by finite elements. [Ahmet Kahraman; United States. Army Aviation Research and Technology Activity.; United.

Linear time-invariant, discrete dynamic models of a generic geared rotor system with proportional viscous damping are developed, by using lumped parameter and dynamic finite element techniques.

The finite element method for rotors was first developed by Ruhl and Booker [29]. Nelson and McVaugh [16] extended this to include gyroscopic effects. The effects of axial torque were included by Zorzi and Nelson [37] and Nelson [15] gave rotor dynamics elements with the Timoshenko beam by: 4.

An analytical study of the dynamic characteristics of a geared rotor-bearing system by the transfer matrix method is presented. Rotating shafts of the system are modeled as Timoshenko beams with effects of shear deformation and gyroscopic moment taken into by: Finite Element Methods for Rotor Dynamics.

proposed 3-D solid finite elements will lead to accurate dynamic stress evaluation. View. Show abstract. Dynamic Analysis of Geared Rotors by Finite Author: Jannumohanty SATYANARAYANA Rao.

Integrally geared compressors are characterized by compact and high efficiency machines, which are widely used in modern processing industries. As an important part of integrally geared compressors, a geared rotor-bearing system exhibits complicated dynamic behaviors.

When running at rated speeds, a coupling system likely produces resonance with an adjusted workload, and a critical load Author: Ming Zhang, Zhinong Jiang, Jinji Gao. Modeling of rotors with three-dimensional solid finite elements, Journal ofStrain Analysis for Engineering Des – Nelson, H.

A finite rotating shaft element using Timoshenko beam theory, Journal ofMechanical Design–Cited by: Finite Elements in Analysis and Design, Vol., p. [Publisher] Choi S. T., Mau S. Dynamic analysis of geared rotor-bearing systems by the transfer matrix : Ming Yan, Hong-quan Liu.

In this paper, a general finite element approach of geared rotor-bearing system is presented in Section 2. The dynamic model of geared rotor-bearing system covers the effects of bearing flexibility and damping, axial force and torque, and gear meshing.

A five-shaft integrally geared compressor is modeled and discussed in Section 3. The bearing. Kahraman A, Ozguven HN, Houser DR, Zakrajsek JJ () Dynamic analysis of geared rotors by finite elements. Trans ASME J Mech Des (03)– CrossRef Google Scholar Lee AS, Lee YS () Rotor dynamic characteristics of an APU gas turbine rotor-bearing system having a tie : Sanjiv Kumar, Rajiv Kumar, Rakesh Sehgal, Sanjeev Bhandari.

Mackerle / Finite element computational dynamics of rotating systems 2. Rotors and their elements The basic elements of a rotor are the disc, the shaft, the bearings and the seals. In this section of the bibli-ography listed papers are dealing with dynamic finite element analyses of rotors andtheir elements,with em.

This book presents the papers from the 10th International Conference on Vibrations in Rotating Machinery. This conference, first held inhas defined and redefined the state-of-the-art in the many aspects of vibration encountered in rotating machinery. To find out the effect of eccentricity of a gear wheel on inherent characteristics of a gear-rotor system, this paper establishes a pair of general transverse-rotational-axial-swinging multi degrees of freedom coupling helical gear meshing dynamic model based on the finite element method (FEM).

Considering the influence of the azimuth, the meshing angle, the helix angle and the rotation Author: Lisha Zhu, Rui Zhang, Changqing Zou. • 2D-model (plane or axisymmetric shell elements): practical interest for projects. • 3D-model (volume elements): used for detailed analyses.

Axisymmetric beam element Axisymmetric shell element Volume element Nodes Dynamic analysis of industrial rotors The File Size: 1MB. Dynamic Analysis of Geared Rotors by Finite Elements, (). Dynamic analysis of piecewise linear oscillators with time periodic coefficients,Author: Raul Tharmakulasingam.

Product: Rotordynamics Module Analyze the Dynamics of Rotating Machinery with the Rotordynamics Module. The pressure distribution in the lubricant of the bearings (rainbow color plot), von Mises stresses (blue color plot), and displacement of the bearings (Orbit plot) resulting from a rotordynamics analysis.

Most rotor systems consist of a homogeneous flexible shaft and discs attached to the shaft, whose dynamic behavior can be described using the FE method.

The shaft is modeled using the Euler-Bernoulli beam finite elements, while discs and AMB rotor parts are represented as rigid bodies (10).The nodes are defined at the locations where rigid bodies, sensors and actuators are placed and, if.

The purpose of this book is to give a basic understanding of rotor dynamics phenomena with the help of simple rotor models and subsequently, the modern analysis methods for real life rotor systems.

This background will be helpful in the identification of rotor-bearing system parameters and its use in futuristic model-based condition monitoring. Finite Element Method. Finite element analysis is based on the principle of discretization and numerical approximation to solve scientific and engineering problems.

In this method, a complex region defining a continuum is discretized into simple geometric shapes called the. A Özgüven, H. N. and Kesan, M., Dynamic Response of Geared Rotors to Internal Excitation by Using a Finite Element Model. "Proceedings of 3rd World Congress on Gearing and Power Transmissions".

Analysis of single and multi-degree-of-freedom structures subjected to various types of excitations and initial conditions. Computational aspects of dynamic analysis. Introduction to approximate methods of analysis.

CE Structural Design in Wood. The course covers the complete design of wood buildings, except for the foundations.This book presents the proceedings of the 9th IFToMM International Conference on Rotor Dynamics.

This conference is a premier global event that brings together specialists from the university and industry sectors worldwide in order to promote the exchange of knowledge, ideas, and information on the latest developments and applied technologies in the dynamics of rotating machinery.