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A Shape Optimization Approach to the Design of a Cartilage Plate Used in Cartilage Tympanoplasty |
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| รหัสดีโอไอ | |
| Creator | 1. Z. Wu 2. K. Okamoto 3. T. Shigeyoshi |
| Title | A Shape Optimization Approach to the Design of a Cartilage Plate Used in Cartilage Tympanoplasty |
| Publisher | Thai Society of Mechanical Engineers (TSME) |
| Publication Year | 2568 |
| Journal Title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| Journal Vol. | 13 |
| Journal No. | 3 |
| Page no. | JRAME-25-13-045 (p.1-12) |
| Keyword | Shape optimization, Myringoplasty, Cartilage tympanoplasty, Tympanic membrane perforation, FEM analysis |
| URL Website | https://ph01.tci-thaijo.org/index.php/jrame/index |
| Website title | Journal of Research and Applications in Mechanical Engineering (JRAME) |
| ISSN | 2229-2152 |
| Abstract | This paper presents a shape optimization approach for a cartilage plate used in cartilage tympanoplasty to more closely approximate the original auditory characteristics of the human ear. First, we constructed a finite element model based on the geometric data of the middle ear, including the tympanic membrane, ossicles, and surrounding muscles. We then proposed a shape optimization method for designing the cartilage plate. The optimization problem was formulated with an objective function defined as the least squares difference between the amplitudes of the stapes post-repair and those in the healthy state across a wide frequency range. To enhance computational efficiency, we derived the shape gradient function and developed a method to calculate it using modal parameters. We employed the H1 gradient method for shape modification. Finally, two numerical examples, using a combination of CAE software and a custom program, were conducted. In an idealized model, the objective function decreased by 98%, while in a repaired tympanic membrane model, it decreased by 43%, demonstrating the effectiveness of our approach. |
