DYNAMIC-MODEL OF A LARGE SPACE STRUCTURE BY A CONTINUOUS APPROACH

The subject of this work is the dynamics of a flexible multibody system modeled as a main rigid body (B0) connected to several flexible appendages (B(i)) (i=1, . . ., n) in a Star Structure. The aim is to analyze the modes of the coupled system and the dynamical response in the frequency domain to external forces and torques. A continuum approach is used for the modal analysis of each flexible appendage. This study enables us to construct the impedance matrix of the whole system, giving the external forces and torques exerted on the system in the frequency domain, in terms of the displacements of the main body. The method is used to obtain the modal analysis of a complex space station modeled as a main body rigidly connected to two large solar panels and one flexible antenna.