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Running excitation of blades bunches
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SYSNO ASEP 0437086 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Running excitation of blades bunches Author(s) Půst, Ladislav (UT-L) RID
Pešek, Luděk (UT-L) RIDSource Title DYMAMESI 2014 : Dynamics of machines and mechanical systems with interactions. - Praha : Institute of Thermomechanics AS CR, 2014 / Zolotarev I. ; Pešek L. - ISBN 978-80-87012-54-3 Pages s. 45-52 Number of pages 8 s. Publication form Print - P Action DYMAMESI 2014 Event date 25.11.2014-26.11.2014 VEvent location Praha Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords damping ; dry friction ; five-blades-bunch ; delayed harmonic excitation Subject RIV BI - Acoustics Institutional support UT-L - RVO:61388998 Annotation Application of additional damping elements or friction connection into blades’ shroud very effectively restricts undesirable vibrations of turbine blades vibrations. The previous investigation of dynamic properties of five-blades-model connected either by a rubber element, by direct Coulomb friction contact or by modified Coulomb friction contact showed very positive results. However, only one type of excitation force vector with one harmonic force acting on the first mass has been used in these studies. Proposed paper will be oriented on the response of the same fiveblades- bunch provided again by means of the same types of dry friction damping connections, but excited by running harmonic force. This type of excitation corresponds better to the real excitation in the steam or gas turbine. Influence of friction forces type, running velocity (depends on ratio of stator and rotor blades numbers), amplitudes of excitation forces, etc. will be analysed and presented. 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 2015
Number of the records: 1