Počet záznamů: 1
Stiffening Effect and Dry-Friction Damping of Bladed Wheel Model with “Tie-Boss” Couplings - Numerical and Experimental Investigation
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SYSNO ASEP 0499318 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV Záznam nebyl označen do RIV Název Stiffening Effect and Dry-Friction Damping of Bladed Wheel Model with “Tie-Boss” Couplings - Numerical and Experimental Investigation Tvůrce(i) Pešek, Luděk (UT-L) RID
Půst, Ladislav (UT-L) RID
Šulc, Petr (UT-L) RID
Šnábl, Pavel (UT-L) ORCID
Bula, Vítězslav (UT-L) RIDCelkový počet autorů 5 Číslo článku 62 Zdroj.dok. Mechanisms and Machine Science 2018. - Switzerland : Springer Naure Switzerland AG 2019, 2018 / Cavalca K.L. ; Weber H.I. - ISBN 978-3-319-99261-7 Rozsah stran s. 148-162 Poč.str. 15 s. Forma vydání Tištěná - P Akce IFToMM Rotordynamics 2018 Datum konání 23.09.2018 - 27.09.2018 Místo konání Rio de Janeiro Země BR - Brazílie Typ akce WRD Jazyk dok. eng - angličtina Země vyd. BR - Brazílie Klíč. slova bladed wheel ; dry-friction contacts ; damping Vědní obor RIV BI - Akustika a kmity Obor OECD Applied mechanics CEP GA16-04546S GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 DOI 10.1007/978-3-319-99262-4 Anotace Bladed wheel model with tie-boss couplings for numerical and experimental investigation of stiffening and friction damping between tie-bosses is introduced. The modal behavior of FE numerical models of the wheel for two contact limit states, i.e. open and bonded contacts, was ascertained. The experimental modal analysis of the wheel both for open and pre-stressed contacts were performed, too. For detail stiffening and damping effect investigationthe physical model of three-blade-bundle was elaborated. The experiments were performed for different excitation forces, excitation frequencies and contact prestresses.The dynamics of the bundle with respect to different contact states was evaluated from vibration attenuation after short resonant excitation. It was observed that if the macroslips arise in contacts that eigen-frequencies of the bundle are very close to the eigen-frequencies of open contact model bundle and high damping effect is achieved. If the microslips arise in contacts the eigenfrequencies are close to eigen-frequencies of the bond contact model and lowdamping is achieved. Hence the stiffening effect is high only in the case of
microslips. The slip transition is conditioned by the level of adhesion that must be exceeded by excitation force. The FE model of the wheel and blade triple model with dynamic frictional contacts in the tie-boss couplings were developed and calculated results are compared with experiment.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 2019
Počet záznamů: 1