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Parametric modal analysis of the brain-CSF-skull system. Influence of the fluid-structure interaction. (English. French summary) Zbl 1278.76135
Summary: Dynamical behavior of the head during an impact is important for analyzing the nduced local damage or diffuse damage in the brain tissue. We determine in the present tudy the natural frequencies and the modal shapes of the system of brain, cerebro-spinal luid and skull. Two models are presented in this work: an elastic-acoustic model assuming a igid skull and an elastic-acoustic-elastic model assuming a deformable skull. It is shown that atural frequencies and more significantly the modal shapes are strongly influenced by the nteraction between solid phases (brain and skull) and the cerebro-spinal fluid.

MSC:
76Z05 Physiological flows
74L15 Biomechanical solid mechanics
74F10 Fluid-solid interactions (including aero- and hydro-elasticity, porosity, etc.)
92C10 Biomechanics
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