A new mathematical model of a short magnetorheological squeeze film damper for rotordynamic applications based on a bilinear oil representation – derivation of the governing equations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F17%3A00484160" target="_blank" >RIV/61388998:_____/17:00484160 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27230/17:10237766 RIV/61989100:27740/17:10237766

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.apm.2017.07.040" target="_blank" >http://dx.doi.org/10.1016/j.apm.2017.07.040</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apm.2017.07.040" target="_blank" >10.1016/j.apm.2017.07.040</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A new mathematical model of a short magnetorheological squeeze film damper for rotordynamic applications based on a bilinear oil representation – derivation of the governing equations

Popis výsledku v původním jazyce

A technological solution frequently used to suppress vibrations in rotating machines consists in adding damping devices to the rotor supports. To achieve their optimum performance, their damping effect must be adaptable to the current operating conditions. This is offered by magnetorheological squeeze film dampers. Magnetorheological oils are usually modelled as Bingham or Herschel-Bulkley fluids with discontinuous stress versus shear rate curves. However, the flow curves of real magnetorheological oils consist of two almost linear parts of different slopes so that their character is closer to a bilinear theoretical material. Magnetorheological dampers are usually implemented in the mathematical models of rotor systems by force couplings, which produce highly nonlinear equations of motion governing their oscillations, and in some cases with a discontinuous flow curve, have solution convergence problems. This paper proposes the use of a bilinear material to model the magnetorheological fluid with a continuous flow curve reducing the nonlinear nature of the governing equations. The expected assets are reaching a more plausible description of the physical behaviour of rotor systems and increase in the stability of the computational procedures for analysis of their lateral vibrations.n

Název v anglickém jazyce

A new mathematical model of a short magnetorheological squeeze film damper for rotordynamic applications based on a bilinear oil representation – derivation of the governing equations

Popis výsledku anglicky

A technological solution frequently used to suppress vibrations in rotating machines consists in adding damping devices to the rotor supports. To achieve their optimum performance, their damping effect must be adaptable to the current operating conditions. This is offered by magnetorheological squeeze film dampers. Magnetorheological oils are usually modelled as Bingham or Herschel-Bulkley fluids with discontinuous stress versus shear rate curves. However, the flow curves of real magnetorheological oils consist of two almost linear parts of different slopes so that their character is closer to a bilinear theoretical material. Magnetorheological dampers are usually implemented in the mathematical models of rotor systems by force couplings, which produce highly nonlinear equations of motion governing their oscillations, and in some cases with a discontinuous flow curve, have solution convergence problems. This paper proposes the use of a bilinear material to model the magnetorheological fluid with a continuous flow curve reducing the nonlinear nature of the governing equations. The expected assets are reaching a more plausible description of the physical behaviour of rotor systems and increase in the stability of the computational procedures for analysis of their lateral vibrations.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Mathematical Modelling

ISSN

0307-904X

e-ISSN

—

Svazek periodika

52

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

18

Strana od-do

558-575

Kód UT WoS článku

000415780400035

EID výsledku v databázi Scopus

2-s2.0-85032384349