On the Effect of Damping on Dispersion Curves in Plates
Abstract eng: This 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.
Contributors:
Publisher:
National Technical University of Athens, 2013
Conference Title:
Conference Title:
COMPDYN 2013 - 4th International Thematic Conference
Conference Venue:
Island of Kos (GR)
Conference Dates:
2013-06-12 / 2013-06-14
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-11-15, last modified 2016-11-15
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