Representation of the magnetorheological fluid by bilinear material model focusing on damping devices for rotordynamic applications

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Representation of the magnetorheological fluid by bilinear material model focusing on damping devices for rotordynamic applications

Popis výsledku v původním jazyce

Unbalance of the rotating parts is the principal source of lateral vibrations of rotors and excitation of time varying forces transmitted between the rotor and its casing. To reduce lateral oscillations the damping devices are placed between the rotor and its frame. This is offered by magnetorheological squeeze film dampers. The experience obtained from a number of carried out simulations show that on certain conditions application of these models arrives at computational difficulties such as loss of stability or convergence of the solution during solving the equations of motion including the cases when determination of the pressure distribution indicates no problems. There are evidences that the reason is the noncontinuous flow curve of the Bingham material. To avoid these problems a new mathematical model of the damping element has been proposed. It is based on the assumptions of the classical theory of lubrication but the magnetorheological oil is represented by bilinear material. F

Název v anglickém jazyce

Representation of the magnetorheological fluid by bilinear material model focusing on damping devices for rotordynamic applications

Popis výsledku anglicky

Unbalance of the rotating parts is the principal source of lateral vibrations of rotors and excitation of time varying forces transmitted between the rotor and its casing. To reduce lateral oscillations the damping devices are placed between the rotor and its frame. This is offered by magnetorheological squeeze film dampers. The experience obtained from a number of carried out simulations show that on certain conditions application of these models arrives at computational difficulties such as loss of stability or convergence of the solution during solving the equations of motion including the cases when determination of the pressure distribution indicates no problems. There are evidences that the reason is the noncontinuous flow curve of the Bingham material. To avoid these problems a new mathematical model of the damping element has been proposed. It is based on the assumptions of the classical theory of lubrication but the magnetorheological oil is represented by bilinear material. F

Druh

O - Ostatní výsledky

CEP obor

JR - Ostatní strojírenství

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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