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Design of test excitation of travelling waves of rotating bladed wheel with multipoint electromagnetic excitation
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SYSNO ASEP 0364697 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Design of test excitation of travelling waves of rotating bladed wheel with multipoint electromagnetic excitation Author(s) Pešek, Luděk (UT-L) RID
Vaněk, František (UT-L) RID
Veselý, Jan (UT-L)
Bula, Vítězslav (UT-L) RID
Cibulka, Jan (UT-L)Source Title Neunte internationale Tagung Schwingungen in Rotierenden Maschinen - SIRM 2011. - Darmstadt : Technische Universität Darmstadt, 2011 - ISBN 978-3-9814163-0-5 Pages s. 1-11 Number of pages 11 s. Publication form CD-ROM - CD-ROM Action SIRM 2011 - International Conference on Vibrations in Rotating Machines /9./ Event date 21.02.2011-23.02.2011 VEvent location Darmstadt Country DE - Germany Event type WRD Language eng - English Country DE - Germany Keywords bladed wheel ; multipoint excitation ; travelling waves ; electromagnetic Subject RIV BI - Acoustics R&D Projects GA101/09/1166 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation The analytical expressions for description of travelling waves in rotating blade wheels are presented in the contribution. Based on the affinity of excitation forces to the travelling waves, the expressions served for design of the optimal distribution and time dependences of the multipoint electromagnetic excitation. Both axissymmetric case of the wheel characterized by multiple eigenvalues and the wheel with imperfection causing the split of this multiplicity were considered. Demonstration of travelling wave awakening is shown on the simple numerical example. The theoretical findings are verified experimentally on the case of free supported ring in non-rotating state and test blade disc under rotation, too. 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 2012
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