A simulation study of the rotor vibration in a journal bearing

Title:

A simulation study of the rotor vibration in a journal bearing

Creator:

Tůma, Jiří, Bilošová, Alena, Šimek, Jiří, and Svoboda, Rudolf

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b2df0ca6-05a3-4f87-90c2-334ec1ab506a
uuid:b2df0ca6-05a3-4f87-90c2-334ec1ab506a

Subject:

rotor stability, hydrodynamic journal bearing, vibration active control, piezoactuators, and proximity probes

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The paper deals with the rotor vibration in journal bearings to prepare a model for verifying the rotor vibration active control. The rotor is maintained in equilibrium position by forces generated in oil film. Bearing forces can be modelled as a spring and damper system. The main goal of the simulation study is to verify the model principle and to estimate parameters by comparing simulation results with experimental data, namely the instability of motion. Test stand with rotor supported in two journal bearings was designed for these purposes. The stand will be equipped with four piezoactuators enabling excitation of bearings by practically arbitrary dynamic force. Theoretical analysis of the influence of external excitation on rotor behaviour was carried out. Up to now the study shows that simple kinematic excitation is effective for reducing rotor excursion while passing critical speeds. To suppress self-exciting vibration of the rotor it is necessary to look for more sophisticated solution. and Obsahuje seznam literatury

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

461-470

Source:

Engineering mechanics: international journal for theoretical and applied mechanics | 2008 Volume:15 | Number:6

Harvested from:

CDK

Metadata only:

false