ANALYSIS OF DYNAMIC BEHAVIOR OF HUMAN MIDDLE-EAR USING A FINITE-ELEMENT METHOD
ANALYSIS OF DYNAMIC BEHAVIOR OF HUMAN MIDDLE-EAR USING A FINITE-ELEMENT METHOD
复制标题
DOI：
10.1121/1.404211
复制
发表时间：
1992-12-01
影响因子：
2.4
通讯作者：
KOBAYASHI, T
中科院分区：
文献类型：
--
作者：
WADA, H;METOKI, T;KOBAYASHI, T
应用通用有限元程序（ISAP），建立了包含听小骨的人体右中耳三维有限元（FEM）模型，通过将FEM分析得到的数值结果与我们开发的扫频中耳分析仪（MEA）获得的新鲜尸体、正常人和患者的测量结果进行比较，确定了中耳的力学性能和边界条件。 “弹性”边界条件由位于环形韧带的鼓膜附件处的线性和扭转弹簧组成，比“完全夹紧”边界条件更适合实际情况。假设听骨链的旋转轴是从锤骨前突到砧骨短突的固定直线，并且听骨链和耳蜗的载荷被简化为用耳蜗的刚度来表示。在这些假设下获得的鼓膜和听小骨在第一共振频率下的振动模式与通过时间平均全息术和使用视频测量系统获得的实验结果一致，除了鼓膜环处的位移相对较大之外。
Applying the general-purpose finite-element package program (ISAP), a three-dimensional finite-element method (FEM) model of a human right middle ear, which included ossicles, was made and the mechanical properties and boundary conditions of the middle ear were determined by a comparison between the numerical results obtained from the FEM analysis and the measurement results of the fresh cadavers, normal subjects and patients, which were obtained by our developed sweep frequency middle ear analyzer (MEA). The "Elastic" boundary condition consisting of linear and torsional springs at the eardrum attachments to the annular ligament was more appropriate for the actual condition than "fully clamped" one. Rotational axis of the ossicular chain was assumed to be a fixed straight line from the anterior process of the malleus to the short process of the incus, and a load of the ossicular chain and cochlea was simplified to be expressed by the stiffness of the cochlea. Vibration patterns of the eardrum and ossicles at the first resonance frequency, obtained under these assumptions, were in agreement with the experimental results obtained by means of time-averaged holography and by using a video measuring system, except for the relatively large displacements at the tympanic ring.