Duncan Comer, Zhai Guangnian, Scherer Ronald
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, Ohio 43403, USA.
J Acoust Soc Am. 2006 Nov;120(5 Pt 1):2859-71. doi: 10.1121/1.2354069.
The penalty immersed boundary (PIB) method, originally introduced by Peskin (1972) to model the function of the mammalian heart, is tested as a fluid-structure interaction model of the closely coupled dynamics of the vocal folds and aerodynamics in phonation. Two-dimensional vocal folds are simulated with material properties chosen to result in self-oscillation and volume flows in physiological frequency ranges. Properties of the glottal flow field, including vorticity, are studied in conjunction with the dynamic vocal fold motion. The results of using the PIB method to model self-oscillating vocal folds for the case of 8 cm H20 as the transglottal pressure gradient are described. The volume flow at 8 cm H20, the transglottal pressure, and vortex dynamics associated with the self-oscillating model are shown. Volume flow is also given for 2, 4, and 12 cm H2O, illustrating the robustness of the model to a range of transglottal pressures. The results indicate that the PIB method applied to modeling phonation has good potential for the study of the interdependence of aerodynamics and vocal fold motion.
惩罚浸入边界（PIB）方法最初由佩斯金于1972年提出，用于模拟哺乳动物心脏的功能，现作为一种流体 - 结构相互作用模型，用于测试发声过程中声带紧密耦合动力学与空气动力学。采用选定的材料属性对二维声带进行模拟，以使其在生理频率范围内产生自激振荡和体积流量。结合声带动态运动，研究了声门流场的特性，包括涡度。描述了使用PIB方法模拟8 cm H20作为跨声门压力梯度情况下自激振荡声带的结果。展示了8 cm H20时的体积流量、跨声门压力以及与自激振荡模型相关的涡旋动力学。还给出了2 cm H2O、4 cm H2O和12 cm H2O时的体积流量，说明了该模型对一系列跨声门压力的鲁棒性。结果表明，将PIB方法应用于发声建模，在研究空气动力学与声带运动的相互依存关系方面具有良好的潜力。
