振子及其耦合条件对圆窗激励式人工中耳性能影响的数值研究

发布时间：2018-03-05 00:27

本文选题：人工中耳　切入点：圆窗　出处：《振动与冲击》2017年04期 　论文类型：期刊论文

【摘要】：为研究振子及其耦合条件对圆窗激励式人工中耳植入性能的影响,建立了包括振子和隔膜在内的人耳有限元模型。该模型基于一无任何听力损伤病史的成年志愿者右耳,采用CT扫描和逆向成型技术建立而成,通过与相关文献的实验数据比对验证了模型的可靠性。基于该模型,分析了圆窗上的初始预压力、振子和隔膜的设计参数变化对振子听力性能的影响。结果表明:振子横截面积越大,其对耳蜗的激励效果越差;隔膜的引入有利于提高振子的激振性能,在该研究范围内,较小的隔膜杨氏模量和厚度有利于提升振子的激振性能;振子质量的增加会恶化振子在高频段的植入性能;在圆窗上施加的初始预压力能够提高中高频段上对耳蜗的激振效果。
[Abstract]:In order to study the effect of vibrator and its coupling conditions on the performance of circular window stimulated artificial middle ear implantation, a finite element model of human ear, including oscillator and diaphragm, was established. The model was based on the right ear of an adult volunteer with no history of hearing impairment. The model was established by CT scanning and reverse molding. The reliability of the model was verified by comparing the experimental data with the related literature. Based on the model, the initial prepressure on the round window was analyzed. The influence of the design parameters of the vibrator and the diaphragm on the hearing performance of the vibrator. The results show that the larger the cross section area of the oscillator is, the worse the excitation effect is to the cochlea, and the introduction of the diaphragm is beneficial to the improvement of the vibration performance of the vibrator. The smaller Young's modulus and thickness of the diaphragm can improve the vibration performance of the vibrator, the increase of the oscillator mass will worsen the implant performance of the vibrator in the high frequency band, and the initial prepressure applied on the circular window can improve the exciting effect of the cochlea on the middle and high frequency band.
【作者单位】：中国矿业大学机电工程学院;上海交通大学振动冲击噪声研究所机械系统与振动国家重点实验室;
【基金】：江苏省自然科学基金资助项目(BK20130194) 国家自然科学基金资助项目(51305442) 中国博士后科学基金资助项目(2015T80597;2013M530276)
【分类号】：R764.9;R318.18

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