Simulation of vocal fold impact pressures with a self-oscillating finite-element model
Simulation of vocal fold impact pressures with a self-oscillating finite-element model
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DOI：
10.1121/1.2197798
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发表时间：
2006-06-01
影响因子：
2.4
通讯作者：
Zhang, Yu
中科院分区：
文献类型：
--
作者：
Tao, Chao;Jiang, Jack J.;Zhang, Yu
利用能够模拟声带振动和气流的自激振荡有限元模型研究了声带冲击压力。计算出的气流压力作为驱动力施加在声带上。然后根据计算出的声带位移调整气流区域。气流和声带之间的相互作用产生了自振荡的解决方案。使用0.2和2.5 kPa之间的肺压来驱动该自振荡模型。研究了冲击压力的空间分布。研究表明，发声过程中的组织碰撞会产生很大的冲击压力，冲击压力与肺压和声门宽度相关。较大的肺压和较窄的声门宽度增加了冲击压力。发现冲击压力大致为肺压的平方根。在舌上方向上，最大撞击压力与声门的最西侧有关。在前后反射中，最大冲击压力出现在声带中点。我们的数值模拟和临床观察之间的匹配表明，这种自振荡的有限元模型可能是有价值的预测机械性损伤的声带。(c)2006年，美国声学学会。
Vocal fold impact pressures were studied using a self-oscillating finite-element model capable of simulating vocal fold vibration and airflow. The calculated airflow pressure is applied on the vocal fold as the driving force. The airflow region is then adjusted according to the calculated vocal fold displacement. The interaction between airflow and the vocal folds produces a self-oscillating solution. Lung pressures between 0.2 and 2.5 kPa were used to drive this self-oscillating model. The spatial distribution of the impact pressure was studied. Studies revealed that the tissue collision during phonation produces a very large impact pressure which correlates with the lung pressure and glottal width. Larger lung pressure and a narrower glottal width increase the impact pressure. The impact pressure was found to be roughly the square root of lung pressure. In the inferior-superior direction, the maximum impact pressure is related to the narrowest glottis. In the anterior-posteriorfirection, the greatest impact pressure appears at the midpoint of the vocal fold. The match between our numerical simulations and clinical observations suggests that this self-oscillating finite-element model might be valuable for predicting mechanical trauma of the vocal folds. (c) 2006 Acoustical Society of America.