Počet záznamů: 1
Multipoint electromagnetic excitation for experimental investigation of rotating bladed wheel dynamics
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SYSNO ASEP 0546975 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Multipoint electromagnetic excitation for experimental investigation of rotating bladed wheel dynamics Tvůrce(i) Pešek, Luděk (UT-L) RID
Šnábl, Pavel (UT-L) ORCID
Půst, Ladislav (UT-L) RID
Bula, Vítězslav (UT-L) RID
Cibulka, Jan (UT-L)Celkový počet autorů 5 Číslo článku 176 Zdroj.dok. 27th International Congress on Sound and Vibration: ICSV27. - Gliwice, Poland : Silesian University Press, 2021 / Carletti E. ; Crocker M. ; Pawelczyk M. ; Tuma J. - ISSN 2329-3675 - ISBN 978-83-7880-799-5 Poč.str. 8 s. Forma vydání Online - E Akce ICSV27- International Congress on Sound and Vibration /27./ Datum konání 11.07.2021 - 16.07.2021 Místo konání Virtual, Online Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. PL - Polsko Klíč. slova rotational tests ; bladed wheels ; travelling waves ; electromagnets ; dynamics Vědní obor RIV BI - Akustika a kmity Obor OECD Applied mechanics CEP GA20-26779S GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 Anotace Modern turbine bladed wheels are designed for higher operating temperatures and flow rates. How-ever, the trend of producing ever-longer and ever-thinner blades leads to lower dynamic stiffness. Therefore, dynamic stiffness and structural damping must be increased by additional structural ele-ments, e.g. tie-bosses, shroud connections. Such a complex mechanical structures with dry friction contacts require very precise experimental investigation under rotation. However, verification of their dynamics needs also sufficient force capacity of contactless excitation to exceed the adhesion forces in contacts. Therefore we have dealt with a development of multipoint electromagnetic exci-tation systems in our rotary laboratory. We use two strategies of excitation. The strategy A is based on the affinity of excitation forces to the travelling waves when analytical solution serves for design of the optimal space distribution and time dependences of the multipoint electromagnetic excitation. As to the placement of electromagnets and phase shift of the excitation harmonic signals, it is de-pendent on number of nodal diameters. At the strategy B, the electromagnetic pulses are synchro-nized with wheel revolutions and with dynamic responses of selected blades measured by the strain-gauge system. It requires accurate synchronization of the electromagnets with wheel revolutions and with a dynamic response of the selected blade. 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 2022 Elektronická adresa https://www.icsv27.org/
Počet záznamů: 1