STUDY REGARDING THE DETERMINING OF THE NATURAL FREQUENCIES AND MODAL SHAPES OF THE COLUMN TYPE STRUCTURES WITH ADDITIONAL MASS.

In this paper there is presented a study regarding the analysis of the dynamic behavior of column type structures with additional mass. By this analysis, we have followed the determining of the natural frequencies and modal shapes via the analytical computing and the simulating with the finite element method (FEM) in the ANSYS program. The results obtained regarding the computed natural frequencies are highlighted in tables and in graphics, whereas concerning the modal shapes for the 9 modes that were analytically and through FEM determined, these are drafted with the help of the MathCad, respectively ANSYS programs. [ABSTRACT FROM AUTHOR]