Konečněprvkový model fonace využívající interakce mezi stalčitelnou tkeutinou a strukturou hlasivek

Finite element modelling of self-sustained voice production using compressible fluid interacting with vocal fold structure

abstrakt

en

Three-dimensional (3D) finite element (FE) model of interaction between the flow-induced self-sustained oscillation of the human vocal folds and the vocal tract acoustics is presented. The vocal tract models of the acoustic spaces for the Czech vowels [a:], [i:] and [u:] were cre-ated by converting the data from the magnetic resonance images (MRI). The FE model includes vocal fold pre-tensioning before phonation, large deformations of the vocal fold tissue, vocal fold contact, fluid-structure interaction, morphing the fluid mesh according to the vocal fold mo-tion by the Arbitrary Lagrangian-Eulerian (ALE) method and unsteady viscous compressible airflow described by the Navier-Stokes equations.

V práci je prezentován prostorový (3D) konečněprvkový (MKP) model proudem vzduchu vyvolaného samobuzeného kmitání lidských hlasivek v kombinaci s akustickými procesy v modelu vokálního traktu. 3D modely vokálních traktů pro české samohlásky [a:], [i:] a [u:] byly vytvořeny na základě dat z magnetické rezonance (MR). Vytvořený MKP model zahrnuje velké deformace tkáně hlasivek, předpětí hlasivek před začátkem fonace, kontakt hlasivek, interakci struktury s tekutinou, morfování sítě vzduchu podle pohybu hlasivek (ALE metoda), nestacionární viskózní stlačitelné proudění popsané pomocí Navier-Stokesových rovnic

Three-dimensional (3D) finite element (FE) model of interaction between the flow-induced self-sustained oscillation of the human vocal folds and the vocal tract acoustics is presented. The vocal tract models of the acoustic spaces for the Czech vowels [a:], [i:] and [u:] were cre-ated by converting the data from the magnetic resonance images (MRI). The FE model includes vocal fold pre-tensioning before phonation, large deformations of the vocal fold tissue, vocal fold contact, fluid-structure interaction, morphing the fluid mesh according to the vocal fold mo-tion by the Arbitrary Lagrangian-Eulerian (ALE) method and unsteady viscous compressible airflow described by the Navier-Stokes equations.

biomechanika hlasu, numerická simulace fonace, metoda konečných prvků

biomechanics of voice, numerical simulation of phonation, Finitel Element Method

05.07.2012

University Hospital Erlangen

Erlangen, Germany

Proceedings of the 8th International Conference on Voice Physiology and Biomechanics

130–131

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