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Dynamics of model bladed disc with friction elements for vibration suppression
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SYSNO ASEP 0348470 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Dynamics of model bladed disc with friction elements for vibration suppression Author(s) Pešek, Luděk (UT-L) RID
Půst, Ladislav (UT-L) RID
Vaněk, František (UT-L) RID
Veselý, Jan (UT-L)
Cibulka, Jan (UT-L)Source Title IFToMM Rotordynamics 2010. - Seoul : Seoul National University, 2010 / Kyung-Woong K. - ISBN 978-89-5708-187-7 Pages s. 332-339 Number of pages 8 s. Publication form CD-ROM - CD-ROM Action IFToMM International Conference on Rotor Dynamics /8./ Event date 12.09.2010-15.09.2010 VEvent location Seoul Country KR - Korea, Republic of Event type WRD Language eng - English Country KR - Korea, Republic of Keywords blade ; slip damping ; mistuning Subject RIV BI - Acoustics R&D Projects GA101/09/1166 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation The model of the test bladed wheel with friction elements was numerically and experimentally investigated for vibration suppression evaluation. The dynamics and contact problem of blade couple with the friction element was modeled by a 3D FE model. The development of micro-slips and macro-slips were observed including time variant contact states at the resonant vibration of the blade couple. The results show non-linear effect of the friction coupling on the dynamics of the couple. For experimental investigation two bunches of blades with friction elements implemented into the bladed disk led to a wheel mistuning with double periodicity. Electromagnetic excitation with sweep excitation was used for the wheel excitation under revolution. Optimal excitation frequency ranges were ascertained for evaluation of frequency response functions (FRF) and identification of split wheel eigenvalues. The damping ratios were used for assessment of the efficiency of dry friction of the elements on the wheel damping. 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 2011
Number of the records: 1