Abstract
A finite‐element model of the vibrational response of fluid‐filled shells with arbitrary shape and composition has been developed using the COMSOL multi‐physics modeling package. The user can specify the properties of the fluid inside the shell including the static pressure. The shell is surrounded by air, which is enclosed by a perfectly matched layer boundary, and an acoustic source is positioned just outside the shell. The frequency response of the shell due to a swept sine acoustic excitation can be recorded at multiple locations. Model results for a spherical aluminum shell filled with water at different static pressures are compared with experiment. Results are also shown for a shell with geometry and material properties similar to a human skull. The goal is to apply this model to predict vibrational response due to changes in intracranial pressure. [Work supported by Central Washington University Science Honors Program.]
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