AI Article Synopsis
- The study uses both traditional and complex modal analyses on a finite element model of the human head-neck system to examine resonant frequencies and mode shapes, revealing results consistent with existing literature.
- It highlights specific modal responses, including higher frequency brain modes and unique responses like the 'mastication' mode of the mandible, emphasizing the need for detailed modeling to capture all frequencies.
- Findings indicate that a damping factor above 0.2 can reduce higher frequency modes while also lowering peak biomechanical responses, underlining the significance of determining the optimal damping factor for accurate assessments.
Article Abstract
This study employs both the traditional and the complex modal analyses of a detailed finite element model of human head-neck system to determine modal responses in terms of resonant frequencies and mode shapes. It compares both modal responses without ignoring mode shapes, and these results are reasonably in agreement with the literature. Increasing displacement contour loops within the brain in higher frequency modes probably exhibits the shearing and twisting modes of the brain. Additional and rarely reported modal responses such as 'mastication' mode of the mandible and flipping mode of nasal lateral cartilages are identified. This suggests a need for detailed modelling to identify all the additional frequencies of each individual part. Moreover, it is found that a damping factor of above 0.2 has amplifying effect in reducing higher frequency modes, while a diminishing effect in lowering peak biomechanical responses, indicating the importance of identifying the appropriate optimised damping factor.
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| http://dx.doi.org/10.1080/10255842.2013.864641 | DOI Listing |
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