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FE Model And Operational Modal Analysis Of Lower Limbs

Aymeric Pionteck, X. Chiementin, M. Múnera, S. Murer, D. Chadefaux, G. Rao
Published 2017 · Engineering

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Human lower limbs are exposed to vibrations on a daily basis, during work, transport or sports. However, most of the FE (Finite Elements) and OMA (Operational Modal Analysis) studies focus either on the whole body or on the hand-arm system. The study presented herein aims at identifying the modal parameters of the lower limbs using a 2D FE model updated using OMA. A numerical model is proposed, and a modal analysis has been performed on 11 subjects. Two repeatable modal frequencies were extracted: 52 . 54 ± 2 . 05 Hz and 118 . 94 ± 2 . 70 Hz , which were used to update the mechanical properties of the numerical model. The knowledge of these modal characteristics makes it possible to design new equipment that would absorb these specific vibrations and possibly reduce the risk of related diseases in the field of sports and transport.
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