Numerical simulation of the effect of stiffness of lamina propria on the self-sustained oscillation of the vocal folds
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F16%3A00459367" target="_blank" >RIV/61388998:_____/16:00459367 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26210/16:PU119427
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Numerical simulation of the effect of stiffness of lamina propria on the self-sustained oscillation of the vocal folds
Original language description
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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BI - Acoustics and oscillation
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA16-01246S" target="_blank" >GA16-01246S: Computational and experimental modelling of self-induced vibrations of vocal folds and influence of their impairments on human voice</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
ENGINEERING MECHANICS 2016
ISBN
978-80-87012-59-8
ISSN
1805-8248
e-ISSN
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Number of pages
4
Pages from-to
182-185
Publisher name
Ústav termomechaniky AV ČR, v. v. i.
Place of publication
Praha
Event location
Svratka
Event date
May 9, 2016
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
000379986700042