Dynamic analysis of the biomechanic behavior of the middle ear and tympanic membrane through the application of the finite element method
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Abstract
The aim of this paper is the dynamic analysis of the biomechanical behavior of the middle ear and the tympanic membrane through the application of the finite element method (FEM). A digital model representing the middle ear (tympanic membrane and ossicular chain) was built through CAT images. The discretization of the model using the finite element method was done based on the ABAQUS program. The tympanic membrane was considered in two ways: with one layer and divided into three layers. The latter is closer to the real situation. Mechanical properties were taken from previous works. The tympanic membrane behavior
was analyzed for an excitation corresponding to the interval between 100 Hz and 10 kHz. The Sound Pressure Level considered was 105 dB. The results obtained were the umbo displacement and the central point of the footplate of the stapes. The largest displacements at the umbo level are found close to 1kHz, whereas at the level of the footplate of the stapes are closer to 500Hz. We can conclude that the results reached with the three layered tympanic membrane have higher amplitude than the results found considering the tympanic membrane with one layer, being closer to the experimental results.
was analyzed for an excitation corresponding to the interval between 100 Hz and 10 kHz. The Sound Pressure Level considered was 105 dB. The results obtained were the umbo displacement and the central point of the footplate of the stapes. The largest displacements at the umbo level are found close to 1kHz, whereas at the level of the footplate of the stapes are closer to 500Hz. We can conclude that the results reached with the three layered tympanic membrane have higher amplitude than the results found considering the tympanic membrane with one layer, being closer to the experimental results.
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