Engineering Mechanics

Proceedings Vol. 21 (2015)

ENGINEERING MECHANICS 2015

Copyright © 2015 Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague

 

P. Hájek, P. Švancara, J. Horáček, J. Švec
pages 78 - 79, full text

The study presents a two-dimensional (2D) finite element (FE) model of the fluidstructure-acoustic interaction during self-sustained oscillation of the human vocal folds (VF). The FE model combines the FE models of the VF, the trachea and the simplified human vocal tract shaped for phonation of Czech vowel [a:]. The developed FE model comprises large deformations of the VF tissue, VF contact, fluid-structure interaction, morphing the fluid mesh according to the VF motion (Arbitrary Lagrangian-Eulerian approach), solution of unsteady viscous compressible airflow described by the Navier-Stokes equations and airflow separation during the glottis closure. The effect of stiffness and damping of lamina propria on VF vibrations and produced sound are analyzed. Such variation of the lamina propria properties can be caused by certain VF pathologies such as sulcus vergeture.

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All papers were reviewed by members of the scientific committee.