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A computational investigation on the reducing lateral vibration of rotors with rolling-element bearings passing through critical speeds by means of tuning the stiffness of the system supports
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SYSNO ASEP 0368079 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A computational investigation on the reducing lateral vibration of rotors with rolling-element bearings passing through critical speeds by means of tuning the stiffness of the system supports Author(s) Zapoměl, Jaroslav (UT-L) RID, ORCID
Ferfecki, Petr (UT-L) RIDNumber of authors 2 Source Title Mechanism and Machine Theory. - : Elsevier - ISSN 0094-114X
Roč. 46, č. 5 (2011), s. 707-724Number of pages 18 s. Language eng - English Country NL - Netherlands Keywords accelerating rotors ; critical speeds ; tuning of the stiffness of the rotor supports Subject RIV JR - Other Machinery CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000287473700010 DOI 10.1016/j.mechmachtheory.2010.12.006 Annotation Since there are manufacturing and assembling inaccuracies rotors are always slightly imbalanced. Their rapid angular acceleration leads to an increase in the magnitude of the tangential component of the imbalance forces. The frequency tuning achieved by changing the stiffness of the rotor supports represents one approach to its attenuation. Stiffness decreases shortly before reaching the critical speed, and after crossover, the stiffness increases again. As almost all publications and computer procedures from the field of rotor dynamics deal only with the case when the rotor turns at a constant angular speed, derivation of the equations of motion of the rotor rotating at variable velocities and investigation of the operating conditions and individual parameters of the supports on the vibration of the rotor passing critical speeds represent the fully new contribution of this paper. To solve the equations of motion the Newmark method has been proposed and tested. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2012 Electronic address http://www.sciencedirect.com/science/article/pii/S0094114X10002314
Number of the records: 1