000015591 001__ 15591 000015591 005__ 20161115135324.0 000015591 04107 $$aeng 000015591 046__ $$k2013-06-12 000015591 100__ $$aManconi, E. 000015591 24500 $$aOn the Effect of Damping on Dispersion Curves in Plates 000015591 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering 000015591 260__ $$bNational Technical University of Athens, 2013 000015591 506__ $$arestricted 000015591 520__ $$2eng$$aThis paper presents a study on quantitative prediction and understanding of timeharmonic wave characteristics in damped plates. Material dissipation is modelled by using complex-valued velocities of free dilatation and shear waves in an unbounded volume. A Wave Finite Element (WFE) method is used to solve the Rayleigh-Lamb problem for a viscoelastic plate in plain strain, and results are validated using a Finite Product (FP) method. A numerical example concerning a viscoelastic panel is then presented in order to illustrate and discuss the role of dissipation in the cut-off phenomenon and in the phenomenon of veering for dispersion curves. These phenomena are explained in more detail considering a simple model, which allows accurate asymptotic analysis of the perturbation of dispersion curves in the regions of cut-off and veering. 000015591 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb. 000015591 653__ $$aGuided waves, Damping, Viscoelasticity, Dispersion, Finite Element, RayleighLamb problem. 000015591 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013 000015591 720__ $$aManconi, E.$$iSorokin, S. 000015591 8560_ $$ffischerc@itam.cas.cz 000015591 8564_ $$s1834050$$uhttps://invenio.itam.cas.cz/record/15591/files/1120.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 28 PERIODICITY EFFECTS AND PERIODICITY-BASED METHODS IN VIBRO-ACOUSTICS AND STRUCTURAL DYNAMICS . 000015591 962__ $$r15525 000015591 980__ $$aPAPER