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Research Papers: Applications

Nonlinear Dynamic Behavior of a Rigid Rotor Supported by Hydrostatic Squeeze Film Dampers

[+] Author and Article Information
A. Bouzidane

Department of Mechanical Engineering, École de technologie supérieure, 1100, Notre-Dame Street West, Montreal, QC, H3C 1K3, Canada

M. Thomas

Department of Mechanical Engineering, École de technologie supérieure, 1100, Notre-Dame Street West, Montreal, QC, H3C 1K3, Canadamarc.thomas@etsmtl.ca

A. A. Lakis

Department of Mechanical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Station Centre-Ville, Montréal, QC, H3C 3A7, Canadaaouni.lakis@meca.polymtl.ca

J. Tribol 130(4), 041102 (Aug 01, 2008) (9 pages) doi:10.1115/1.2958079 History: Received May 25, 2007; Revised April 24, 2008; Published August 01, 2008

This research project aims to study the nonlinear dynamic behavior of a rigid rotor supported by hydrostatic squeeze film dampers (HSFDs). The investigated HSFD consists of four hydrostatic bearing flat pads fed by capillary restrictors. A nonlinear hydrostatic squeeze film damper model is developed, and the results are compared with those obtained using a linear approach. The effect of unbalance eccentricity on the vibration response and the transmitted force of the HSFD are investigated using the linear and nonlinear models. The results show good agreement between the linear and nonlinear methods when the unbalance force is small. However, as the unbalance forces become larger, the results obtained using the linear models cease to be representative of the real behavior of rotor dynamics and a nonlinear approach must be conducted. The effects of supply pressure, viscosity, pressure ratio, and rotational speed on the response and the force transmitted to the HSFD are investigated using a nonlinear approach.

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Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Hydrostatic squeeze film damper geometry and nomenclature

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Figure 2

Hydrostatic bearing flat pads

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Figure 3

Boundary conditions of hydrostatic squeeze film dampers

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Figure 4

Flow chart for nonlinear process

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Figure 5

Influence of unbalance eccentricity on vibratory response and transmitted force

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Figure 6

Influence of supply pressure on the vibratory response and transmitted force by nonlinear method

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Figure 7

Influence of viscosity on the vibratory response and transmitted force by nonlinear method

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Figure 8

Influence of pressure ratio on the vibratory response and transmitted force by nonlinear method

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