On the wave propagation in the biological structure in the applications of CT image

Abstract

The skull structure in humans consists of several interlocking bones that forms the head. The upper portion of the skull is the cranial bone which protects the brain. The left and right side of the cranial bones supports ears. The structure of the bone with cortical and cancellous bones is very similar to the panel structure. Moreover, bone conduction hearing becomes the significant way in transferring sound, which amplifies investigations on the vibrational characteristics of the cranial bones. Thus, in the current work, phase velocity information of the skull as a main part of the body under in-plane loading is presented. According to this issue, the frequency behavior of biological skull structure using higher-order shear deformation theory with nine parameters is investigated. An analytical method is applied for solving the governing equations of the biological skull structure. The novelty of the current study is the consideration of the nine parameters of displacement for the doubly curved panel, and porosity, as well as in-plane loading, are implemented on the proposed model using the analytical method. A comprehensive parametric investigation is performed to show the effects of in-plane loading, porosity coefficient, and geometry on the frequency behavior of biological skull structure under in-plane loading.