基于螺旋型耳蜗的数值分析

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (14) : 45-51.

论文

基于螺旋型耳蜗的数值分析

陈懿强 1 ，姚文娟 1

作者信息 +

Numerical Simulation Based on Spiral Cochlear

Chen Yiqiang 1 Yao Wenjuan 1

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文章历史 +

摘要

利用Patran建立包括前庭阶、鼓阶、基底膜、圆窗、卵圆窗在内的三维空间螺旋耳蜗模型。结合Nastran对基底膜进行频率响应分析，得到基底膜位移响应与耳蜗内压力（包括前庭阶与鼓阶处的压力），计算结果与相关实验吻合，验证了模型的正确性。基于空间螺旋模型研究了流体黏度对于耳蜗阻抗的影响以及正向、逆向激励对于基底膜12mm处沿横向位移幅值的影响。结果表明，由于流体黏度的存在增大了耳蜗的阻抗。同时，当频率较高时，在正，逆不同激励作用下，相对于简化的直腔耳蜗模型，螺旋基底膜的曲率对基底膜沿横向的幅值影响较大，从侧面反应出螺旋耳蜗结构本身的曲率对基底膜感音域的扩大作用。

Abstract

In this paper, a three-dimensional passive spiral cochlear model which includes the oval window (OW), round window (RW), basilar membrane (BM) is established. Harmonic response analysis is then carried out. Results on the cochlear impedance, basilar membrane response and intracochlear pressure which contain the scala vestibule and scala tympani pressure are obtained. The satisfactory agreements between the model results and the experimental data in the literature prove the validity of the finite element (FE) model. Based on the FE model, the effect of fluid viscosity to the cochlear impedance and variation of the amplitude of the BM in a transverse direction at 12mm under normal forward sound stimulation and reverse RW stimulation have been discussed. The results suggest that the cochlear impedance is increased because of the fluid viscosity. In the meantime, compared with the simplified uncoiled model, the curvature of the spiral BM has a great effect on the amplitude in a transverse direction at high frequencies under different stimulations and the range of sense in frequency is expanded on account of the spiral geometrical characteristic.

导出引用

陈懿强 1,姚文娟 1. 基于螺旋型耳蜗的数值分析[J]. 振动与冲击, 2017, 36(14): 45-51

Chen Yiqiang 1 Yao Wenjuan 1 . Numerical Simulation Based on Spiral Cochlear[J]. Journal of Vibration and Shock, 2017, 36(14): 45-51

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