Comparison of a fiber-gel finite element model of vocal fold vibration to a transversely isotropic stiffness model

Ingo R Titze; Fariborz Alipour; Douglas Blake; Anil Palaparthi

doi:10.1121/1.5001055

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Comparison of a fiber-gel finite element model of vocal fold vibration to a transversely isotropic stiffness model

Journal article

Peer reviewed

Comparison of a fiber-gel finite element model of vocal fold vibration to a transversely isotropic stiffness model

Ingo R Titze, Fariborz Alipour, Douglas Blake and Anil Palaparthi

The Journal of the Acoustical Society of America, Vol.142(3), pp.1376-1383

09/2017

DOI: 10.1121/1.5001055

PMCID: PMC5595586

PMID: 28964045

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https://www.ncbi.nlm.nih.gov/pmc/articles/5595586View

Open Access

Abstract

A fiber-gel vocal fold model is compared to a transversely isotropic stiffness model in terms of normal mode vibration. The fiber-gel finite element model (FG-FEM) consists of a series of gel slices, each with a two-dimensional finite element mesh, in a plane transverse to the tissue fibers. The gel slices are coupled with fibers under tension in the anterior-posterior dimension. No vibrational displacement in the fiber-length direction is allowed, resulting in a plane strain state. This is consistent with the assumption of transverse displacement of a simple string, offering a wide range of natural frequencies (well into the kHz region) with variable tension. For low frequencies, the results compare favorably with the natural frequencies of a transversely isotropic elastic stiffness model (TISM) in which the shear modulus in the longitudinal plane is used to approximate the effect of fiber tension. For high frequencies, however, the natural frequencies do not approach the string mode frequencies unless plane strain is imposed on the TISM model. The simplifying assumption of plane strain, as well as the use of analytical closed-form shape functions, allow for substantial savings in computational time, which is important in clinical and exploratory applications of the FG-FEM model.

Computer Simulation

Elasticity

Finite Element Analysis

Gels

Humans

Models, Biological

Vibration

Vocal Cords - physiology

Details

Title: Subtitle: Comparison of a fiber-gel finite element model of vocal fold vibration to a transversely isotropic stiffness model
Creators: Ingo R Titze - National Center for Voice and Speech, 136 South Main Street, Suite 320, Salt Lake City, Utah 84101, USA
Fariborz Alipour - National Center for Voice and Speech, 136 South Main Street, Suite 320, Salt Lake City, Utah 84101, USA
Douglas Blake - National Center for Voice and Speech, 136 South Main Street, Suite 320, Salt Lake City, Utah 84101, USA
Anil Palaparthi - National Center for Voice and Speech, 136 South Main Street, Suite 320, Salt Lake City, Utah 84101, USA
Resource Type: Journal article
Publication Details: The Journal of the Acoustical Society of America, Vol.142(3), pp.1376-1383
DOI: 10.1121/1.5001055
PMID: 28964045
PMCID: PMC5595586
NLM abbreviation: J Acoust Soc Am
ISSN: 0001-4966
eISSN: 1520-8524
Grant note: R01 DC012045 / NIDCD NIH HHS
Language: English
Date published: 09/2017
Academic Unit: School of Music; Communication Sciences and Disorders
Record Identifier: 9984719754102771

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