A comparative study of the vibrational effects on the boundary conditions of a slender beam

This paper presents an investigation of the effect of boundary conditions in experimental modal analysis to approximate the free-free boundary conditions in the experimental modal analysis of a slender beam. Experimental modal analysis and numerical simulation of normal mode analysis were performed to obtain the modal parameters and predicted results in term of the natural frequencies and mode shapes. Two different boundary conditions have been considered in this paper which are the suspension location at the end points of the beam and at nodal points of the beam. The experimental results indicate that there is uncorrelated pattern for the type of mode (bending and torsional modes) for the suspension location at the end points of the beam. For the conclusion, the suspension at the location of the nodal points shows a better correlation in term of mode shapes and MAC values in comparison to the end points suspension location.