Hydro-elastic finite element model of a vocal fold replicaReport as inadecuate

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1 GIPSA-GAMA - GAMA GIPSA-DPC - Département Parole et Cognition 2 LMB - Laboratoire de Mathématiques de Besançon 3 M&S - Matériaux et Structures LMA - Laboratoire de Mécanique et d-Acoustique Marseille 4 LMA - Laboratoire de Mécanique et d-Acoustique Marseille

Abstract : Experimental vocal fold replicas are currently used in speech production studies in order to validate simplified models on controllable devices. In addition to in-situ mechanical characterization, it is important to be able to understand their behavior when changing assembly properties or using parameters control to tune the folds, by developing a model able to predict their static and dynamic motions. This also enables to describe more complex vibration behaviors which could be harder to observe experimentally. This paper first presents a hydro-elastic finite element model of a single vocal fold. Numerical results are discussed, along with a parametric analysis. Then this model is extended to take into account the effect of the water pressure on the inflation of the folds and on the resonance frequencies. A hyper-elastic calculation is first used to simulate the latex inflation. An updated Lagrangian approach processes it as a pre-stress term in a modal analysis calculation for the small amplitude vibrations of the hydro-elastic structure, which allows to model the water pressure influence on the mechanical resonances of the simulated replica.

Keywords : Fluid-structure Interaction Acoustics Vocal folds Modal Analysis Finite Elements Vibrations

Author: Nicolas Hermant - Xavier Pelorson - Paul Luizard - Franz Chouly - Fabrice Silva -

Source: https://hal.archives-ouvertes.fr/


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