ON THE DAMPED FREQUENCY-RESPONSE OF A FINITE-ELEMENT MODEL OF THE CAT EARDRUM
ON THE DAMPED FREQUENCY-RESPONSE OF A FINITE-ELEMENT MODEL OF THE CAT EARDRUM
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DOI：
10.1121/1.394749
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发表时间：
1987-06-01
影响因子：
2.4
通讯作者：
KHANNA, SM
中科院分区：
文献类型：
--
作者：
FUNNELL, WRJ;DECRAEMER, WF;KHANNA, SM
本文介绍了猫耳膜的三维有限元模型计算的频率响应，该模型考虑了阻尼。阻尼项由质量比例项和刚度比例项表示。在轻阻尼的情况下，鼓膜上远离柄的点的频率响应呈现出许多窄的极小值和极大值，其频率和幅度随着鼓膜上不同位置的不同而不同。耳柄上的频率响应比远离耳柄的鼓膜上的频率响应更平滑。增加阻尼度可以使耳柄和鼓膜上远离耳柄的频率响应变得平滑。即使当阻尼值足够大以平滑除最大变化之外的所有变化时，总体位移幅度也不会显著降低。给出了实验观测到的猫耳膜的频率响应，并与模型结果进行了比较。
This article presents frequency responses calculated using a three-dimensional finite-element model of the cat eardrum that includes damping. The damping is represented by both mass-proportional and stiffness-proportional terms. With light damping, the frequency responses of points on the eardrum away from the manubrium display numerous narrow minima and maxima, the frequencies and amplitude of which are different for different positions on the eardrum. The frequency response on the manubrium is smoother than that on the eardrum away from the manubrium. Increasing the degree of damping smooths the frequency responses both on the manubrium and on the eardrum away from the manubrium. The overall displacement magnitudes are not significantly reduced even when the damping is heavy enough to smooth out all but the largest variations. Experimentally observed frequency responses of the cat eardrum are presented for comparison with the model results.