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首页> 外文期刊>Journal of Fluids and Structures >Influence of subglottic stenosis on the flow-induced vibration of a computational vocal fold model
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Influence of subglottic stenosis on the flow-induced vibration of a computational vocal fold model

机译：声门下狭窄对声带计算模型流动诱发振动的影响

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摘要

The effect of subglottic stenosis on vocal fold vibration is investigated. An idealized stenosis is defined, parameterized, and incorporated into a two-dimensional, fully coupled finite element model of the vocal folds and laryngeal airway. Flow-induced responses of the vocal fold model to varying severities of stenosis are compared. The model vibration was not appreciably affected by stenosis severities of up to 60% occlusion. Model vibration was altered by stenosis severities of 90% or greater, evidenced by decreased superior model displacement, glottal width amplitude, and flow rate amplitude. Predictions of vibration frequency and maximum flow declination rate were also altered by high stenosis severities. The observed changes became more pronounced with increasing stenosis severity and inlet pressure, and the trends correlated well with flow resistance calculations. Flow visualization was used to characterize subglottal flow patterns in the space between the stenosis and the vocal folds. Underlying mechanisms for the observed changes, possible implications for human voice production, and suggestions for future work are discussed.
机译：研究了声门下狭窄对声带振动的影响。定义，参数化理想的狭窄，并将其合并到声带和喉道的二维完全耦合有限元模型中。比较了声带模型对狭窄程度不同的血流诱发反应。狭窄程度高达60％的狭窄严重程度不会明显影响模型振动。狭窄严重程度达到90％或更高会改变模型振动，这可以通过减少模型上位位移，声门宽度幅度和流速幅度来证明。高狭窄程度也改变了振动频率和最大流量偏斜率的预测。随着狭窄程度和入口压力的增加，观察到的变化变得更加明显，并且该趋势与流阻计算非常相关。血流可视化用于表征狭窄和声带之间空间中的声门下血流模式。讨论了观察到的变化的潜在机制，对人声产生的潜在影响以及对未来工作的建议。

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