The mathematical modelling of nonlinear vibration of rotors influenced by magnetic and electric effects

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F17%3A00483554" target="_blank" >RIV/61388998:_____/17:00483554 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The mathematical modelling of nonlinear vibration of rotors influenced by magnetic and electric effects

Original language description

The main parts of magnetorheological squeeze film dampers are two concentric rings separated by a gap filled with magnetorheological oil. Squeezing the oil film due to the rotor vibration produces the damping force. The magnetic flux generated in coils embedded in the damper housing passes through the lubricant and as its flow resistance depends on magnetic induction the change of the applied current can be used to control the damping force. The variation of the width of the damper gap changes the magnetic flux, which induces the electromotoric voltage and consequently reduces the applied current. As a result, the rotor vibration attenuation depends on a complex interaction between mutually coupled mechanical, hydraulic, magnetic, and electric transient phenomena. In the developed mathematical model the magnetorheological oil is represented by a bilinear material and the damper body by a set of meridian segments. Each segment is considered to be a divided core of an electromagnet with the gap filled with the magnetorheological oil. The pressure distribution in the lubricating film is governed by the Reynolds equation adapted to bilinear material. The goal of the carried out investigations was to learn more on nonlinear effects and a complex influence of the electromagnetic phenomena occurring in magnetorheological damping devices on the vibration attenuation of rotors.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20302 - Applied mechanics

Project

<a href="/en/project/GA15-06621S" target="_blank" >GA15-06621S: Modelling of smart damping elements of rotating systems utilizing the physical properties of magnetorheological fluids</a><br>

Continuities

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

Publication year

2017

Confidentiality

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

Article name in the collection

Vibration, Control and Stability of Dynamical Systems

ISBN

978-83-935312-5-7

ISSN

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e-ISSN

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Number of pages

8

Pages from-to

579-586

Publisher name

Department of Automation, Biomechanics and Mechatronics

Place of publication

Lodž

Event location

Lodž

Event date

Dec 11, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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