000001975 001__ 1975
000001975 005__ 20141118153447.0
000001975 04107 $$acze
000001975 046__ $$k2011-05-09
000001975 100__ $$aŠašek, J.
000001975 24500 $$aMODAL ANALYSIS OF THE IMPERFECT BLADED DISK WITH FRICTION ELEMENTS 

000001975 24630 $$n17.$$pEngineering Mechanics 2011
000001975 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Brno
000001975 506__ $$arestricted
000001975 520__ $$2eng$$aThis paper is concerned with mathematical modeling of the imperfect bladed disk with friction elements, which are used to suppress blade vibration. These kinds of systems are mainly used in steam turbines where our interests are aimed. The friction elements are placed between shrouds of selected central symmetrical mounted blades (imperfection). A slipping is considered on the both contact surfaces. The model of the bladed disk is based on decomposition into a disk subsystem and a blading subsystem. The finite element method is used for modeling of the both subsystems. All influences of steady-state rotation are respected as centrifugal forces, gyroscopic effects, centrifugal stiffening of blades and dynamic softening. The model is used for a modal analysis of non-rotating and rotating imperfect bladed disk. Selected natural modes of non-rotating system will be shown. Dependency of eigenfrequencies on the angular velocity is presented in Campbell diagram. The methodology of simulation and postprocessing are implemented in an in-house software.

000001975 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000001975 653__ $$aBladed disk, modal analysis, FEM, friction element.

000001975 7112_ $$aEngineering Mechanics 2011$$cSvratka (CZ)$$d2011-05-09 / 2011-05-12$$gEM2011
000001975 720__ $$aŠašek, J.$$iKellner, J.$$iZeman, V.
000001975 8560_ $$ffischerc@itam.cas.cz
000001975 8564_ $$s948290$$uhttps://invenio.itam.cas.cz/record/1975/files/p137.pdf$$y
             Original version of the author's contribution as presented on book, page 587.
            
000001975 962__ $$r1835
000001975 980__ $$aPAPER