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Dynamics of model bladed disc with friction elements for vibration suppression
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SYSNO ASEP 0348470 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Dynamics of model bladed disc with friction elements for vibration suppression Tvůrce(i) Pešek, Luděk (UT-L) RID
Půst, Ladislav (UT-L) RID
Vaněk, František (UT-L) RID
Veselý, Jan (UT-L)
Cibulka, Jan (UT-L)Zdroj.dok. IFToMM Rotordynamics 2010. - Seoul : Seoul National University, 2010 / Kyung-Woong K. - ISBN 978-89-5708-187-7 Rozsah stran s. 332-339 Poč.str. 8 s. Forma vydání CD-ROM - CD-ROM Akce IFToMM International Conference on Rotor Dynamics /8./ Datum konání 12.09.2010-15.09.2010 Místo konání Seoul Země KR - Korejská republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. KR - Korejská republika Klíč. slova blade ; slip damping ; mistuning Vědní obor RIV BI - Akustika a kmity CEP GA101/09/1166 GA ČR - Grantová agentura ČR CEZ AV0Z20760514 - UT-L (2005-2011) Anotace 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. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2011
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