Modal analysis of biocomposite materials beams reinforced by Washingtonia Filifera natural fibers

In this paper, a modal analysis is carried out on a novel composite material reinforced by Washingtonia Filifera palm fibers with a 20 % loading rate. The experimental analysis by the "PULSE" vibrations acquisition device was carried out for a composite beam reinforced by the studied fiber. The determination of natural frequencies and modal damping is of great importance for the survival of structures. The precise knowledge of these frequencies allows the elimination of the resonance phenomenon in these structures. For this purpose, an excitation pot equipped with an impedance head is used, which allows the determination of the transfer function directly. Theoretical calculation of the six first vibrations modes is carried out which are compared with experimental results. Dynamic studies show the possibility of using this biomaterial in industrial real operating conditions.