基于有限元方法的中耳听骨链结构运动机理研究

Objective To reconstruct the middle ear structure in three-dimensional by Micro-CT data, and explore the motion ruleof chain ossicles and tympanic membrane vibration characteristics in biomechanical theory research by using the finite elementmethod. Methods The model was verified correctly by comparing finite element simulation data with experimental data aboutthe amplitude of tympanic membrane umbo and stapes footplate. The conclusion was drawn by frequency response analysis andmodal analysis. Results (1) The vibration and rotation of ossicular chain were different under various frequencies. Threeossicles performed rotating and rocking motion around axis of rotation. Manubrium mallei close to tympanic membrane umboperformed in same phase rotation and translation. Stapes footplate performed translation like the piston. (2) At the frequencyof 1000 Hz, the total bending deformation of tympanic membrane ran up to 2.32e-006 m, which appeared in annular ligamentof tympanic membrane. The maximum deformation of the membrane tympani umbo was about 1.0e-007 m. Under theexcitation of sound pressure, the annular ligament of tympanic membrane was prone to distortion. The stress concentrationoccurred in the vicinity of membrane tympani umbo.The maximum stress was 8.33e-004 MPa. Conclusion Motion of ossicularchain will provide theoretical guidance for life science research and clinical operation of human ears.