The mathematical model for analysis of attenuation of nonlinear vibration of rigid rotors influenced by electromagnetic effects

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00497805" target="_blank" >RIV/61388998:_____/19:00497805 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27230/19:10240255 RIV/61989100:27740/19:10240255

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0022460X18307600?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022460X18307600?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jsv.2018.11.008" target="_blank" >10.1016/j.jsv.2018.11.008</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The mathematical model for analysis of attenuation of nonlinear vibration of rigid rotors influenced by electromagnetic effects

Popis výsledku v původním jazyce

The vibration of rotors supported by rolling element bearings mounted in controllable squeeze film magnetorheological dampers depends of a complex interaction between mutually coupled mechanical, hydraulic, magnetic and electric phenomena. In the developed mathematical model of the magnetorheological damper the magnetorheological oil is represented by a bilinear material, the yielding shear stress of which is a function of magnetic induction, 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 magnetorheological oil. The pressure distribution in the lubricating film is governed by the Reynolds equation, adapted to bilinear material. The dependence of the yielding shear stress of magnetic induction is approximated by a power function. The current in the electric circuit is determined from the equation of the voltage equilibrium. The presented mathematical model of the magnetorheological squeeze film damper was implemented in the computational procedures for transient dynamical analysis of rotor systems. The goal of the investigations was to learn more about the nonlinear effects, time delays, and complex influences of the electromagnetic phenomena occurring in magnetorheological damping devices used in the vibration attenuation of rotors. The development of the enhanced mathematical model of a magnetorheological squeeze film damper and extending knowledge upon the influence of electromagnetic phenomena in reducing lateral vibration of rigid rotors are the main contributions of this article.

Název v anglickém jazyce

The mathematical model for analysis of attenuation of nonlinear vibration of rigid rotors influenced by electromagnetic effects

Popis výsledku anglicky

The vibration of rotors supported by rolling element bearings mounted in controllable squeeze film magnetorheological dampers depends of a complex interaction between mutually coupled mechanical, hydraulic, magnetic and electric phenomena. In the developed mathematical model of the magnetorheological damper the magnetorheological oil is represented by a bilinear material, the yielding shear stress of which is a function of magnetic induction, 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 magnetorheological oil. The pressure distribution in the lubricating film is governed by the Reynolds equation, adapted to bilinear material. The dependence of the yielding shear stress of magnetic induction is approximated by a power function. The current in the electric circuit is determined from the equation of the voltage equilibrium. The presented mathematical model of the magnetorheological squeeze film damper was implemented in the computational procedures for transient dynamical analysis of rotor systems. The goal of the investigations was to learn more about the nonlinear effects, time delays, and complex influences of the electromagnetic phenomena occurring in magnetorheological damping devices used in the vibration attenuation of rotors. The development of the enhanced mathematical model of a magnetorheological squeeze film damper and extending knowledge upon the influence of electromagnetic phenomena in reducing lateral vibration of rigid rotors are the main contributions of this article.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/LQ1602" target="_blank" >LQ1602: IT4Innovations excellence in science</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Sound and Vibration

ISSN

0022-460X

e-ISSN

—

Svazek periodika

443

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

168-177

Kód UT WoS článku

000455674200011

EID výsledku v databázi Scopus

2-s2.0-85059327519