The Dynamics of Rotor with Rubbing

This paper presents the description of some phenomena associated with dynamic behavior of rotors interacting with stationary components. Numerical simulations show rotor vibration spectrum rich in subharmonic, quasi-periodic, and chaotic vibrations. The nonlinear calculation techniques are applied t...

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Main Authors: Jerzy T. Sawicki, Joe Padovan, Rabih Al-Khatib
Format: Article
Language:English
Published: Wiley 1999-01-01
Series:International Journal of Rotating Machinery
Subjects:
Online Access:http://dx.doi.org/10.1155/S1023621X99000263
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author Jerzy T. Sawicki
Joe Padovan
Rabih Al-Khatib
author_facet Jerzy T. Sawicki
Joe Padovan
Rabih Al-Khatib
author_sort Jerzy T. Sawicki
collection DOAJ
description This paper presents the description of some phenomena associated with dynamic behavior of rotors interacting with stationary components. Numerical simulations show rotor vibration spectrum rich in subharmonic, quasi-periodic, and chaotic vibrations. The nonlinear calculation techniques are applied to demonstrate the changes of the vibration patterns for different operating conditions. Some conclusions are discussed with regard to unique characteristics of rub-induced rotor response, initial conditions, as well as appropriate ranges of system parameters. Of special interest are the changes in the apparent nonlinearity of the system dynamics as rubs are induced at different rotor speeds. In particular, starting with 2nd order sub/superharmonics, which are symptomatic of quadratic nonlinearity, progressively higher order polynomial behavior is excited, i.e., cubic, giving rise to 3rd order sub/superharmonics. As the speed is transitioned between such apparent nonlinearities, chaotic like behavior is induced because of the lack of whole or rational tone tuning between the apparent system frequency and the external source noise. The cause of such behavior will be discussed in detail along with the results of several parametric studies.
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spelling doaj-art-425c1faeff144d39bbd6eb9e3e55509a2025-02-03T05:58:06ZengWileyInternational Journal of Rotating Machinery1023-621X1999-01-015429530410.1155/S1023621X99000263The Dynamics of Rotor with RubbingJerzy T. Sawicki0Joe Padovan1Rabih Al-Khatib2Department of Mechanical Engineering, Cleveland State University, Cleveland, OH 44115-2425, USADepartment of Mechanical Engineering, University of Akron, Akron, OH 44325-3903, USADepartment of Mechanical Engineering, Cleveland State University, Cleveland, OH 44115-2425, USAThis paper presents the description of some phenomena associated with dynamic behavior of rotors interacting with stationary components. Numerical simulations show rotor vibration spectrum rich in subharmonic, quasi-periodic, and chaotic vibrations. The nonlinear calculation techniques are applied to demonstrate the changes of the vibration patterns for different operating conditions. Some conclusions are discussed with regard to unique characteristics of rub-induced rotor response, initial conditions, as well as appropriate ranges of system parameters. Of special interest are the changes in the apparent nonlinearity of the system dynamics as rubs are induced at different rotor speeds. In particular, starting with 2nd order sub/superharmonics, which are symptomatic of quadratic nonlinearity, progressively higher order polynomial behavior is excited, i.e., cubic, giving rise to 3rd order sub/superharmonics. As the speed is transitioned between such apparent nonlinearities, chaotic like behavior is induced because of the lack of whole or rational tone tuning between the apparent system frequency and the external source noise. The cause of such behavior will be discussed in detail along with the results of several parametric studies.http://dx.doi.org/10.1155/S1023621X99000263RotorVibrationChaosPoincaré mapBifurcation diagramRub impact.
spellingShingle Jerzy T. Sawicki
Joe Padovan
Rabih Al-Khatib
The Dynamics of Rotor with Rubbing
International Journal of Rotating Machinery
Rotor
Vibration
Chaos
Poincaré map
Bifurcation diagram
Rub impact.
title The Dynamics of Rotor with Rubbing
title_full The Dynamics of Rotor with Rubbing
title_fullStr The Dynamics of Rotor with Rubbing
title_full_unstemmed The Dynamics of Rotor with Rubbing
title_short The Dynamics of Rotor with Rubbing
title_sort dynamics of rotor with rubbing
topic Rotor
Vibration
Chaos
Poincaré map
Bifurcation diagram
Rub impact.
url http://dx.doi.org/10.1155/S1023621X99000263
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