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Název:
Numerical simulation of the effect of stiffness of lamina propria on the self-sustained oscillation of the vocal folds
Autoři: Hájek, P. ; Švancara, P. ; Horáček, Jaromír ; Švec, J. G.
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering Mechanics 2016 /22./, Svratka (CZ), 2016-05-09 / 2016-05-12
Rok: 2016
Jazyk: eng
Abstrakt: A two-dimensional (2D) finite element (FE) model of the fluid-structure-acoustic interaction during selfsustained oscillation of the human vocal folds (VF) is presented in this paper. The aim is to analyze the effect of stiffness of lamina propria on VF vibrations. Such stiffness change can be caused by some VF pathologies. The developed FE model consists of the FE models of the VF, trachea and a simplified human vocal tract. The vocal tract model shaped for simulation of phonation of Czech vowel [a:] was created by converting data from the magnetic resonance images (MRI). The developed FE model includes VF contact, large deformations of the VF tissue, fluid-structure interaction (FSI), moving boundary of the fluid mesh (Arbitrary Lagrangian-Eulerian (ALE) approach), airflow separation during the glottis closure and solution of unsteady viscous compressible airflow described by the Navier-Stokes equations. The numerical simulations showed that higher values of lamina propria Young's modulus (stiffer lamina propria) result in a decrease of the maximum glottis opening. Stiffer lamina propria also requires the use of higher subglottal pressure to initiate self-sustained vibration of the VF.
Klíčová slova: biomechanics of voice; finite element method; fluid-structure-acoustic interaction; simulation of phonation
Číslo projektu: GA16-01246S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: ENGINEERING MECHANICS 2016, ISBN 978-80-87012-59-8, ISSN 1805-8248
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0260730
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-253615
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Autoři: Hájek, P. ; Švancara, P. ; Horáček, Jaromír ; Švec, J. G.
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering Mechanics 2016 /22./, Svratka (CZ), 2016-05-09 / 2016-05-12
Rok: 2016
Jazyk: eng
Abstrakt: A two-dimensional (2D) finite element (FE) model of the fluid-structure-acoustic interaction during selfsustained oscillation of the human vocal folds (VF) is presented in this paper. The aim is to analyze the effect of stiffness of lamina propria on VF vibrations. Such stiffness change can be caused by some VF pathologies. The developed FE model consists of the FE models of the VF, trachea and a simplified human vocal tract. The vocal tract model shaped for simulation of phonation of Czech vowel [a:] was created by converting data from the magnetic resonance images (MRI). The developed FE model includes VF contact, large deformations of the VF tissue, fluid-structure interaction (FSI), moving boundary of the fluid mesh (Arbitrary Lagrangian-Eulerian (ALE) approach), airflow separation during the glottis closure and solution of unsteady viscous compressible airflow described by the Navier-Stokes equations. The numerical simulations showed that higher values of lamina propria Young's modulus (stiffer lamina propria) result in a decrease of the maximum glottis opening. Stiffer lamina propria also requires the use of higher subglottal pressure to initiate self-sustained vibration of the VF.
Klíčová slova: biomechanics of voice; finite element method; fluid-structure-acoustic interaction; simulation of phonation
Číslo projektu: GA16-01246S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: ENGINEERING MECHANICS 2016, ISBN 978-80-87012-59-8, ISSN 1805-8248
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0260730
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-253615
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Záznam vytvořen dne 2016-07-19, naposledy upraven 2022-09-29.