# Validation and analysis of dynamic operation of a rotor-bearing system with hybrid lubrication

E. Martínez, V. R. Nossov, J. C. Gómez

Research output: Contribution to journalArticle

### Abstract

A mathematical model of a rotor-bearing system and its validation and analysis of its dynamics, are presented. The bearings used in the study were of the cylindrical, pressurized type. Following the theory of the Reynolds equation and the Jeffcott rotor model, a fourth-order mathematical model was obtained, with its respective rotodynamic coefficients. The model obtained was implemented for control in open and closed loops. The results obtained showed that the threshold velocity of stability increased considerably and also the amplitude of the vibration decreased in non-linear form depending on the injection pressure applied to the lubricant. On the basis of the results obtained it is concluded that pressurized bearings could be highly reliable in industrial applications.
Original language American English 83-90 73 Informacion Tecnologica Published - 1 Jan 2004 Yes

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Bearings (structural)
Lubrication
rotors
Theoretical Models
mathematical models
Rotors
Lubricants
lubricants
industrial applications
Vibration
vibration
Mathematical models
Reynolds equation
injection
Pressure
Injections
Industrial applications
lubricant
analysis
Mathematical model

### Cite this

title = "Validation and analysis of dynamic operation of a rotor-bearing system with hybrid lubrication",
abstract = "A mathematical model of a rotor-bearing system and its validation and analysis of its dynamics, are presented. The bearings used in the study were of the cylindrical, pressurized type. Following the theory of the Reynolds equation and the Jeffcott rotor model, a fourth-order mathematical model was obtained, with its respective rotodynamic coefficients. The model obtained was implemented for control in open and closed loops. The results obtained showed that the threshold velocity of stability increased considerably and also the amplitude of the vibration decreased in non-linear form depending on the injection pressure applied to the lubricant. On the basis of the results obtained it is concluded that pressurized bearings could be highly reliable in industrial applications.",
author = "E. Mart{\'i}nez and Nossov, {V. R.} and G{\'o}mez, {J. C.}",
year = "2004",
month = "1",
day = "1",
language = "American English",
pages = "83--90",
journal = "Informacion Tecnologica",
issn = "0716-8756",
publisher = "Centro de Informacion Tecnologica",

}

Validation and analysis of dynamic operation of a rotor-bearing system with hybrid lubrication. / Martínez, E.; Nossov, V. R.; Gómez, J. C.

In: Informacion Tecnologica, 01.01.2004, p. 83-90.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Validation and analysis of dynamic operation of a rotor-bearing system with hybrid lubrication

AU - Martínez, E.

AU - Nossov, V. R.

AU - Gómez, J. C.

PY - 2004/1/1

Y1 - 2004/1/1

N2 - A mathematical model of a rotor-bearing system and its validation and analysis of its dynamics, are presented. The bearings used in the study were of the cylindrical, pressurized type. Following the theory of the Reynolds equation and the Jeffcott rotor model, a fourth-order mathematical model was obtained, with its respective rotodynamic coefficients. The model obtained was implemented for control in open and closed loops. The results obtained showed that the threshold velocity of stability increased considerably and also the amplitude of the vibration decreased in non-linear form depending on the injection pressure applied to the lubricant. On the basis of the results obtained it is concluded that pressurized bearings could be highly reliable in industrial applications.

AB - A mathematical model of a rotor-bearing system and its validation and analysis of its dynamics, are presented. The bearings used in the study were of the cylindrical, pressurized type. Following the theory of the Reynolds equation and the Jeffcott rotor model, a fourth-order mathematical model was obtained, with its respective rotodynamic coefficients. The model obtained was implemented for control in open and closed loops. The results obtained showed that the threshold velocity of stability increased considerably and also the amplitude of the vibration decreased in non-linear form depending on the injection pressure applied to the lubricant. On the basis of the results obtained it is concluded that pressurized bearings could be highly reliable in industrial applications.

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M3 - Article

SP - 83

EP - 90

JO - Informacion Tecnologica

JF - Informacion Tecnologica

SN - 0716-8756

ER -