000003779 001__ 3779
000003779 005__ 20141118153347.0
000003779 04107 $$acze
000003779 046__ $$k2008-05-12
000003779 100__ $$aMalenovský, E.
000003779 24500 $$aCOMPUTATIONAL AND EXPERIMENTAL ANALYSIS THE INTERACTION OF ELASTIC CONTINUUM WITH LIQUID

000003779 24630 $$n14$$pEngineering Mechanics 2008
000003779 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Brno
000003779 506__ $$arestricted
000003779 520__ $$2eng$$aThis contribution is focused on the analysis of dynamic behavior of elastic body moving in liquid. In many technical applications this motion is with large displacements. Some technical applications can be vibration of blades or rotors in centrifugal pumps or water turbines. But on other hand presented approach has more general application. In general case dynamic behavior are the modal behavior, steady state response and nonstationary response. Because of are assumed the large displacements, this analysis is nonlinear and modal behavior depends on a parameters. There is very difficult or impossible to do this analysis using commercial programme systems. It is caused by limited number of boundary conditions for contact between body and liquid in these systems. In this contribution is presented the mathematical model of a new type of boundary conditions which allowed the modal analysis and computing the steady state response. In principle this analysis is if the frequency domain. It is necessary provided some testing, because this approach is new. For this case, the curvilinear co-ordinates were chosen. The Bézier body was chosen for the description of geometrical configuration and also for approximation the solution. MATLAB programme code was chosen for software processing. Nomenclature mij , bij , kij - elements of local matrices of mass, damping and stiffness, ui - i - base function (see appendix), S E - area of element with pressure lay - out, p,σ - vectors of pressure and viscous forces in the i direction, reached on surface unit, p - pressure, Π ij - nonreversible stress tensor, ni , n j - one - unitary vector of external normal line element with regard to liquid, f - function dependent on p and σ as a consequence of FEM, η1 - dynamic viscosity, ci - velocity, xi , z - coordinates, ql - time function for l th shape of vibration, vil - ith deformation parameter for l th shape of vibration, S , Γ1 , Γ2 , Γ3 - denotation of surfaces enclosing liquid volume, α il , α, α1 , α 2 - velocity functions, β1il , β 2il , β, β1 , β 2 , β 3 - pressure

000003779 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000003779 653__ $$a

000003779 7112_ $$aEngineering Mechanics 2008$$cSvratka (CZ)$$d2008-05-12 / 2008-05-15$$gEM2008
000003779 720__ $$aMalenovský, E.$$iPochylý, F.
000003779 8560_ $$ffischerc@itam.cas.cz
000003779 8564_ $$s2815776$$uhttp://invenio.itam.cas.cz/record/3779/files/Malenovsky_FT.pdf$$y
             Original version of the author's contribution as presented on CD, , page 561.
            
000003779 962__ $$r3717
000003779 980__ $$aPAPER