MODELING OF THE DAMPED OSCILLATIONS OF THE VISCOUS BEAMS STRUCTURES WITH SWIVEL JOINTS FOR HARMONIC MODE

Mechanic studies realized on the two dimensional be ams structures with swivel joints show that in stat ics, the vertical displacement is continuous, but the rotation is discontinuous at th e node where there is a swivel joint. Moreover, in dynamics, many authors do not usually take into account the friction effect, mode ling of these structures. We propose in this paper, a modeling of the beams structures with swivel joints which integrates viscosity effec ts in dynamics. Hence this work we will present the formulation of motion equations of such structures and the modal analysis method wh ich is used to solve these equations.