Publication detail

Numerical computation of the damping and stiffness coefficients of the classical and magnetorheological squeeze film damper

FERFECKI, P. ZAPOMĚL, J. ŠOFER, M. POCHYLÝ, F. FIALOVÁ, S.

English title

Numerical computation of the damping and stiffness coefficients of the classical and magnetorheological squeeze film damper

Type

conference paper

Language

en

Original abstract

Technological solution, frequently used to suppress vibrations in rotating machines, consists in adding damping devices between the rotor and its frame. This is enabled by dampers working on the principle of a squeezing thin classical or magnetorheological fluid film. The Navier-Stokes equations, Reynolds equation, and modified Navier-Stokes equations are used to determine the pressure distribution in the thin fluid film. The damping and stiffness coefficients are computed by the developed procedure presented in this paper. The proposed computational approach is based on the perturbation of the synchronous circular whirling motion. The carriedout computational simulations show that the investigated mathematical models of the squeeze film damper and magnetorheological squeeze film damper allowed computation of the damping and stiffness coefficients. It has been found that the stiffness coefficients computed by the proposed mathematical models may be different.

English abstract

Technological solution, frequently used to suppress vibrations in rotating machines, consists in adding damping devices between the rotor and its frame. This is enabled by dampers working on the principle of a squeezing thin classical or magnetorheological fluid film. The Navier-Stokes equations, Reynolds equation, and modified Navier-Stokes equations are used to determine the pressure distribution in the thin fluid film. The damping and stiffness coefficients are computed by the developed procedure presented in this paper. The proposed computational approach is based on the perturbation of the synchronous circular whirling motion. The carriedout computational simulations show that the investigated mathematical models of the squeeze film damper and magnetorheological squeeze film damper allowed computation of the damping and stiffness coefficients. It has been found that the stiffness coefficients computed by the proposed mathematical models may be different.

Keywords in English

Squeeze film damper, Magnetorheological fluid, Hydraulic forces, Navier-Stokes equations, Reynolds equation

Released

14.03.2018

Publisher

EDP Sciences

ISSN

2261-236X

Book

XXII SLOVAK-POLISH SCIENTIFIC CONFERENCE ON MACHINE MODELLING AND SIMULATIONS 2017

Volume

157

Number

1

Pages from–to

080011–0800112

Pages count

12

BIBTEX


@inproceedings{BUT146662,
  author="Petr {Ferfecki} and Jaroslav {Zapoměl} and Michal {Šofer} and František {Pochylý} and Simona {Fialová},
  title="Numerical computation of the damping and stiffness coefficients of the classical and magnetorheological squeeze film damper",
  booktitle="XXII SLOVAK-POLISH SCIENTIFIC CONFERENCE ON MACHINE MODELLING AND SIMULATIONS 2017 ",
  year="2018",
  volume="157",
  number="1",
  month="March",
  pages="080011--0800112",
  publisher="EDP Sciences",
  issn="2261-236X"
}