On the effect of damping on dispersion curves in plates

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:50

Article

Manconi, Elisabetta¹  Sorokin, Sergey² 

[1] Univ Parma, Dipartimento Ingn Ind, I-43100 Parma, Italy

[2] Aalborg Univ, Dept Mech & Mfg Engn, Aalborg, Denmark

关键词: Guided waves;    Dispersion;    Viscoelasticity;    Rayleigh-Lamb problem;    Coupled waveguide;   

DOI  :  10.1016/j.ijsolstr.2013.02.016

来源: Elsevier

【 摘 要 】

This paper presents a study on quantitative prediction and understanding of time-harmonic wave characteristics in damped plates. Material dissipation is modelled by using complex-valued velocities of free dilatation and shear waves in an unbounded volume. As a numerical example, solution of the classical Rayleigh-Lamb problem for a viscoelastic plate is presented 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. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

Free