000001920 001__ 1920
000001920 005__ 20141118153450.0
000001920 04107 $$acze
000001920 046__ $$k2011-05-09
000001920 100__ $$aLošák, P.
000001920 24500 $$aOPTIMIZATION OF BLADED DISK PASSIVE DAMPING ELEMENT 

000001920 24630 $$n17.$$pEngineering Mechanics 2011
000001920 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Brno
000001920 506__ $$arestricted
000001920 520__ $$2eng$$aThis paper is aimed at reducing vibrations of bladed disk in particular operating state. The damping element used in this contribution is realized by a strap with isosceles trapezoidal cross-section area which is placed in hoop dovetail groove in the blade shrouding. The friction effect between the damping element and the groove side walls is included. Sliding between the contact surfaces leads to the dissipation of energy which causes decreasing of undesirable vibrations. The frictional force is influenced by centrifugal force acting on the damping element. The centrifugal force depends on disk angular speed, mass of the damping element and also on the size of contact area. It is shown that the axial vibrations of bladed disk in particular operating state is influenced by dimensions of the damping element crosssection Dimensional optimization is used to find the optimal dimensions. The process of finding optimal dimensions is described in this paper. The finite element model of bladed disk involving passive damping element is created and the critical operating state is selected. The selection of design variables is discussed. The objective function is defined and optimization is performed.

000001920 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000001920 653__ $$aBladed disk vibrations, vibrations damping, transient analysis, optimization.

000001920 7112_ $$aEngineering Mechanics 2011$$cSvratka (CZ)$$d2011-05-09 / 2011-05-12$$gEM2011
000001920 720__ $$aLošák, P.$$iMalenovský, E.
000001920 8560_ $$ffischerc@itam.cas.cz
000001920 8564_ $$s802952$$uhttp://invenio.itam.cas.cz/record/1920/files/p082.pdf$$y
             Original version of the author's contribution as presented on book, page 367.
            
000001920 962__ $$r1835
000001920 980__ $$aPAPER