This work presents the modal analysis of a multiple degree of freedom system. Firstly the theory, which was used to deduce the equation of motion and to perform the modal analysis is presented. Theory includes basics of oscilation, matrix formulation of equations, the Runge-Kutta method and small angle approximation. Afterwards the derivation of equations of motion , which are written in matrix notation is presented along with the harmonic excitation. The modal parameters are calculated using numerical modal analysis with Mathematica software. Within the results, the own and forced responses of the system are presented and the parametric analysis is performed.
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