Model of turbine blades bundles

0392226 - ÚT 2014 CZ eng A - Abstract
Půst, Ladislav - Pešek, Luděk
Model of turbine blades bundles.
ENGINEERING MECHANICS 2013. Praha: Insitute of Thermomechanics ASCR, v. v. i., 2013 - (Zolotarev, I.). s. 125-126. ISBN 978-80-87012-46-8. ISSN 1805-8248.
[Engineering Mechanics 2013 /19./. 13.05.2013-16.05.2013, Svratka]
R&D Projects: GA ČR GA101/09/1166
Institutional support: RVO:61388998
Keywords : free and forced vibrations * eigenmodes * bundle of blades
Subject RIV: BI - Acoustics

A detail analysis of dynamical properties of five-blades-bundle mathematical model was carried out with the aim to investigate how the damping elements made of special rubber inserted into slots between blades heads influence the response curves at different distribution of exciting harmonic forces. Viscous-elastic linear Voigt–Kelvin model was used for modeling the rheological properties of damping elements. Constant values of stiffness and damping parameters were supposed at analysis, but the frequency dependent parameters are mentioned as well. The effect of complicated form of higher modes of vibration on blades bundle amplitude resonance level is shown. The importance of orthogonality of excitation forces distribution to the other eigenmodes of blades bundle is discovered at isolating selected resonance.
Permanent Link: http://hdl.handle.net/11104/0225176