Finite-element analysis of middle-ear pressure effects on static and dynamic behavior of human ear.
Finite-element analysis of middle-ear pressure effects on static and dynamic behavior of human ear.
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DOI：
10.1121/1.2749417
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发表时间：
2007-07
期刊：
影响因子：
--
通讯作者：
Xuelin Wang;T. Cheng;R. Gan
中科院分区：
文献类型：
--
作者：
Xuelin Wang;T. Cheng;R. Gan
将超弹性Mooney-Rivlin材料模型与几何非线性相结合，在人耳三维模型中对中耳在中耳压力变化下的静态行为进行了有限元分析。然后建立了计算中耳软组织材料参数的经验公式，即中耳软组织相对于中耳压力的应力相关弹性模数。预测了在不同正负中耳压力下，中耳对耳道内声压的动态响应行为。静态分析的结果表明，正中耳压力比负压力产生的鼓膜和脚板的静态位移要大得多。动态分析表明，正中耳压力作用下Tm和踏板振动幅值的减小主要是由弹性模应力依赖性决定的。负压作用下TM和脚板振动的减小是由于中耳结构的几何变化和弹性模量的应力依赖性共同作用的结果。
A finite-element analysis for static behavior of middle ear under variation of the middle-ear pressure was conducted in a 3D model of human ear by combining the hyperelastic Mooney-Rivlin material model and geometry nonlinearity. An empirical formula was then developed to calculate material parameters of the middle-ear soft tissues as the stress-dependent elastic modulus relative to the middle-ear pressure. Dynamic behavior of the middle ear in response to sound pressure in the ear canal was predicted under various positive and negative middle-ear pressures. The results from static analysis indicate that a positive middle ear pressure produces the static displacements of the tympanic membrane (TM) and footplate more than a negative pressure. The dynamic analysis shows that the reductions of the TM and footplate vibration magnitudes under positive middle-ear pressure are mainly determined by stress dependence of elastic modulus. The reduction of the TM and footplate vibrations under negative pressure was caused by both the geometry changes of middle-ear structures and the stress dependence of elastic modulus.