Computational modeling of vibration‐induced systemic hydration of vocal folds over a range of phonation conditions

Computational modeling of vibration‐induced systemic hydration of vocal folds over a range of phonation conditions
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在一系列发声条件下振动引起的声带系统水化的计算模型

DOI:
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发表时间:
2014
影响因子:
2.1
通讯作者:
T. Siegmund
T. Siegmund
中科院分区:
工程技术3区
文献类型:
--
作者:
P. Bhattacharya;T. Siegmund

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预测发声条件是良性的声音健康仍然是一个生物力学相关的问题。我们的目标是提供基于连续体的VF模型的声带(VF)水合的见解,该模型能够计算发声期间的VF应力,以及基于线性叠加原理的此类计算数据的提取和推广方案。因为VF组织是多孔弹性的,所以针对给定发声条件计算的VF流体静力学应力的空间梯度确定VF间质流体流动。本方法变换,基于线性叠加原理,在特定的发声的那些在任意发声条件下的计算出的组织间液速度。间隙流体流动特性的一系列发声条件进行了比较。对于没有或中度碰撞的发声条件,在整个VF中预测每个振动周期没有脱水。对于更严重的碰撞条件,组织脱水被限制在靠近声门表面的区域。VF中的间质流体位移被发现是不均匀的,并且强烈依赖于发声条件。一个发声条件被发现存在的脱水峰。所提出的方法显着扩展的范围和相关性进行隔离的VF振动的数值模拟。版权所有© 2014约翰威利父子有限公司.
Predicting phonation conditions that are benign to voice health remains a biomechanically relevant problem. Our objective is to provide insight into vocal fold (VF) hydration based on continuum‐based VF models that are able to compute VF stresses during phonation and a scheme for the extraction and generalization of such computational data based on the principle of linear superposition. Because VF tissue is poroelastic, spatial gradients of VF hydrostatic stresses computed for a given phonation condition determine VF interstitial fluid flow. The present approach transforms, based on linear superposition principles, the computed interstitial fluid velocities at the particular phonation to those at an arbitrary phonation condition. Intersititial fluid flow characteristics for a range of phonation conditions are compared. For phonation conditions with no or moderate collision, no dehydration per vibration cycle is predicted throughout the VF. For more severe collision conditions, tissue dehydration is restricted to a region close to the glottal surface. Interstitial fluid displacement in the VF is found to be heterogeneous and strongly dependent on the phonation condition. A phonation condition is found to exist for which dehydration peaks. The proposed method significantly expands the scope and relevance of conducting isolated numerical simulations of VF vibration. Copyright © 2014 John Wiley & Sons, Ltd.
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